{"id":10122,"date":"2026-10-26T08:00:00","date_gmt":"2026-10-26T05:00:00","guid":{"rendered":"https:\/\/www.yunuskaytan.com\/?p=10122"},"modified":"2026-10-26T08:00:00","modified_gmt":"2026-10-26T05:00:00","slug":"php-de-degiskenler-ve-veri-turleri","status":"publish","type":"post","link":"https:\/\/www.yunuskaytan.com\/en\/yk\/php-de-degiskenler-ve-veri-turleri\/","title":{"rendered":"PHP&#8217;de De\u011fi\u015fkenler ve Veri T\u00fcrleri"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Dinamik web uygulamalar\u0131 geli\u015ftirirken kullan\u0131c\u0131 girdilerini saklamak, hesaplamalar yapmak ve veritaban\u0131 i\u015flemlerini y\u00f6netmek i\u00e7in verileri bellekte tutacak mekanizmalara ihtiya\u00e7 duyulur. PHP programlama dilinde bu gereksinimi kar\u015f\u0131layan en temel yap\u0131 ta\u015flar\u0131 de\u011fi\u015fkenlerdir. Bu rehberde, PHP de\u011fi\u015fkenler konusunu, de\u011fi\u015fken tan\u0131mlama kurallar\u0131n\u0131 ve PHP&#8217;nin destekledi\u011fi temel veri t\u00fcrlerini ayr\u0131nt\u0131l\u0131 olarak inceleyece\u011fiz.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PHP De\u011fi\u015fken Tan\u0131mlama Kurallar\u0131 ve S\u00f6zdizimi<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP dilinde bir de\u011fi\u015fken tan\u0131mlan\u0131rken her zaman dolar i\u015fareti ($) kullan\u0131l\u0131r. Dolar i\u015faretinin hemen ard\u0131ndan gelen ifade, de\u011fi\u015fkenin ad\u0131n\u0131 belirler. PHP yorumlay\u0131c\u0131s\u0131, bir sat\u0131rda $ i\u015faretini g\u00f6rd\u00fc\u011f\u00fcnde bunu bir bellek alan\u0131 ba\u015fvurusu olarak i\u015fler.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PHP de\u011fi\u015fkenler tan\u0131mlan\u0131rken belirli s\u00f6zdizimi kurallar\u0131na uyulmas\u0131 zorunludur:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>De\u011fi\u015fken adlar\u0131 mutlaka dolar ($) i\u015fareti ile ba\u015flamal\u0131d\u0131r.<\/li>\n\n<li>Dolar i\u015faretinden sonraki ilk karakter bir harf (a-z, A-Z) veya alt \u00e7izgi (_) olmak zorundad\u0131r. Rakamla ba\u015flayamaz.<\/li>\n\n<li>De\u011fi\u015fken ad\u0131 bo\u015fluk i\u00e7eremez; harf, rakam ve alt \u00e7izgi kombinasyonlar\u0131ndan olu\u015fabilir.<\/li>\n\n<li>PHP de\u011fi\u015fken isimleri b\u00fcy\u00fck-k\u00fc\u00e7\u00fck harfe duyarl\u0131d\u0131r (case-sensitive). \u00d6rne\u011fin $kullanici ve $Kullanici iki farkl\u0131 bellek alan\u0131n\u0131 temsil eder.<\/li>\n\n<li>T\u00fcrk\u00e7e karakterler (\u00e7, \u011f, \u0131, \u00f6, \u015f, \u00fc) teknik olarak desteklense de kodun ta\u015f\u0131nabilirli\u011fi ve genel yaz\u0131l\u0131m standartlar\u0131 a\u00e7\u0131s\u0131ndan yaln\u0131zca \u0130ngiliz alfabesindeki karakterler tercih edilmelidir.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$ad = \"Ahmet\";\n$_yas = 25;\n$kullaniciAdi = \"admin\";\n$sayi1 = 100;\n?&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Yukar\u0131daki kod blo\u011funda ge\u00e7erli de\u011fi\u015fken tan\u0131mlamalar\u0131 yer almaktad\u0131r. E\u015fittir (=) sembol\u00fc atama operat\u00f6r\u00fcd\u00fcr; sa\u011fdaki de\u011feri al\u0131r ve soldaki de\u011fi\u015fkene aktar\u0131r.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PHP&#8217;de De\u011fi\u015fkenlerin \u00c7al\u0131\u015fma Mant\u0131\u011f\u0131 ve Gev\u015fek Tip \u00d6zelli\u011fi<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP, &#8220;loosely typed&#8221; yani gev\u015fek tipli (dinamik) bir dildir. C veya Java gibi dillerin aksine, bir de\u011fi\u015fken tan\u0131mlarken onun hangi t\u00fcrde veri tutaca\u011f\u0131n\u0131 (metin, tam say\u0131, ondal\u0131kl\u0131 say\u0131 vb.) \u00f6nceden belirtmeniz gerekmez. PHP, de\u011fi\u015fkene atanan de\u011fere bakarak t\u00fcr\u00fc \u00e7al\u0131\u015fma zaman\u0131nda otomatik olarak belirler.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bir de\u011fi\u015fkene \u00f6nce metin t\u00fcr\u00fcnde bir veri atay\u0131p ard\u0131ndan ayn\u0131 de\u011fi\u015fkene tam say\u0131 atamak PHP&#8217;de tamamen ge\u00e7erlidir:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$deger = \"Merhaba Dunya\";\n$deger = 42;\n?&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130lk sat\u0131rda $deger de\u011fi\u015fkeni bir metin dizgisi iken, ikinci sat\u0131rdaki atama sonras\u0131nda bu de\u011fi\u015fken otomatik olarak bir tam say\u0131ya d\u00f6n\u00fc\u015f\u00fcr.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Skaler Veri T\u00fcrleri<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Skaler t\u00fcrler, tek bir de\u011feri tutabilen en temel veri t\u00fcrleridir. PHP&#8217;de d\u00f6rt ana skaler veri t\u00fcr\u00fc bulunur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">String (Karakter Dizisi)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Metinsel ifadeleri saklamak i\u00e7in kullan\u0131l\u0131r. Tek t\u0131rnak (&#8216; &#8216;) veya \u00e7ift t\u0131rnak (&#8221; &#8220;) aras\u0131nda tan\u0131mlan\u0131r. \u00c7ift t\u0131rnak i\u00e7erisinde yaz\u0131lan de\u011fi\u015fkenler do\u011frudan \u00e7\u00f6z\u00fcmlenirken (interpolation), tek t\u0131rnak i\u00e7indeki de\u011fi\u015fkenler d\u00fcz metin olarak kabul edilir.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$ad = \"Yunus\";\n$mesaj1 = \"Hos geldin $ad\";\n$mesaj2 = 'Hos geldin $ad';\n\necho $mesaj1;\necho $mesaj2;\n?&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Bu \u00f6rnekte $mesaj1 ekrana &#8220;Hos geldin Yunus&#8221; \u00e7\u0131kt\u0131s\u0131n\u0131 verirken, $mesaj2 ekrana &#8220;Hos geldin $ad&#8221; \u00e7\u0131kt\u0131s\u0131n\u0131 yazd\u0131racakt\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Integer (Tam Say\u0131)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ondal\u0131k k\u0131sm\u0131 bulunmayan pozitif veya negatif tam say\u0131lard\u0131r. Bellekte platforma ba\u011fl\u0131 olarak genellikle 32 bit veya 64 bit boyutunda yer kaplarlar.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$pozitifSayi = 1500;\n$negatifSayi = -45;\n$sifir = 0;\n?&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Float \/ Double (Ondal\u0131kl\u0131 Say\u0131)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kesirli veya ondal\u0131kl\u0131 say\u0131lar\u0131 saklar. Ondal\u0131k basamaklar\u0131 ay\u0131rmak i\u00e7in virg\u00fcl de\u011fil, nokta (.) karakteri kullan\u0131l\u0131r.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$fiyat = 89.99;\n$oran = -0.15;\n?&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Boolean (Mant\u0131ksal De\u011fer)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yaln\u0131zca iki olas\u0131 de\u011fere sahip olan en basit veri t\u00fcr\u00fcd\u00fcr: true (do\u011fru) veya false (yanl\u0131\u015f). Ko\u015fullu ifadelerde ve ak\u0131\u015f kontrol mekanizmalar\u0131nda kritik rol oynar.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$girisYapildi = true;\n$yoneticiMi = false;\n?&gt;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Bile\u015fik Veri T\u00fcrleri<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bile\u015fik t\u00fcrler, birden fazla de\u011feri ve yap\u0131y\u0131 tek bir de\u011fi\u015fken alt\u0131nda organize etmeyi sa\u011flar.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Array (Dizi)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Birden \u00e7ok veriyi tek bir de\u011fi\u015fken \u00fczerinde depolamak i\u00e7in kullan\u0131l\u0131r. \u0130ndeksli diziler say\u0131sal s\u0131ra kullan\u0131rken, ili\u015fkisel diziler (associative arrays) anahtar-de\u011fer (key-value) \u00e7iftlerini temel al\u0131r.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$renkler = [\"Kirmizi\", \"Mavi\", \"Yesil\"];\n\n$kullanici = [\n    \"ad\" =&gt; \"Yunus\",\n    \"rol\" =&gt; \"Yazar\"\n];\n\necho $renkler[0];\necho $kullanici[\"ad\"];\n?&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Bu kod blo\u011funda $renkler dizisinin ilk eleman\u0131 olan &#8220;Kirmizi&#8221; ve $kullanici ili\u015fkisel dizisinin &#8220;ad&#8221; anahtar\u0131na kar\u015f\u0131l\u0131k gelen &#8220;Yunus&#8221; de\u011feri ekrana yazd\u0131r\u0131l\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Object (Nesne)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nesne y\u00f6nelimli programlama (OOP) kapsam\u0131nda bir s\u0131n\u0131f\u0131n (class) somut \u00f6rne\u011fidir. Hem verileri (\u00f6zellikler) hem de fonksiyonlar\u0131 (metotlar) b\u00fcnyesinde bar\u0131nd\u0131r\u0131r.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\nclass Sunucu {\n    public $ip = \"192.168.1.1\";\n}\n\n$sunucuNesnesi = new Sunucu();\necho $sunucuNesnesi-&gt;ip;\n?&gt;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u00d6zel Veri T\u00fcrleri<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP&#8217;de belirli durumlar\u0131 ve d\u0131\u015f ba\u011flant\u0131lar\u0131 temsil eden iki \u00f6zel veri t\u00fcr\u00fc mevcuttur.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NULL: Bir de\u011fi\u015fkenin hi\u00e7bir de\u011fere sahip olmad\u0131\u011f\u0131n\u0131 belirtir. De\u011feri atanmam\u0131\u015f ya da unset() fonksiyonu ile bellekten temizlenmi\u015f de\u011fi\u015fkenler NULL kabul edilir.<\/li>\n\n<li>Resource (Kaynak): Veritaban\u0131 ba\u011flant\u0131s\u0131 veya dosya tan\u0131t\u0131c\u0131s\u0131 gibi harici sistem kaynaklar\u0131na yap\u0131lan referanslar\u0131 tutar.<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$bosDegisken = null;\n$dosya = fopen(\"deneme.txt\", \"w\");\n?&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Burada $bosDegisken a\u00e7\u0131k\u00e7a tan\u0131ms\u0131z k\u0131l\u0131nm\u0131\u015f, $dosya ise dosya sistemine ba\u011fl\u0131 bir kaynak t\u00fcr\u00fc elde etmi\u015ftir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Veri T\u00fcrlerini \u0130nceleme ve T\u00fcr D\u00f6n\u00fc\u015f\u00fcmleri<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Geli\u015ftirme s\u00fcrecinde bir de\u011fi\u015fkenin anl\u0131k t\u00fcr\u00fcn\u00fc ve i\u00e7eri\u011fini g\u00f6rmek i\u00e7in var_dump() veya gettype() fonksiyonlar\u0131 kullan\u0131l\u0131r.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n$port = \"8080\";\nvar_dump($port);\n\n$sayisalPort = (int)$port;\nvar_dump($sayisalPort);\n?&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">var_dump($port) komutu de\u011fi\u015fkenin string t\u00fcr\u00fcnde ve 4 karakter uzunlu\u011funda oldu\u011funu bildirir. (int) s\u00f6zdizimi ile yap\u0131lan d\u00f6n\u00fc\u015f\u00fcm (type casting) sonras\u0131nda de\u011fi\u015fken integer t\u00fcr\u00fcne evrilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PHP&#8217;de de\u011fi\u015fkenlerin t\u00fcr\u00fcn\u00fc do\u011frulamak i\u00e7in \u015fu kontrol fonksiyonlar\u0131ndan yararlan\u0131l\u0131r:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>is_string($degisken): Metin olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.<\/li>\n\n<li>is_int($degisken): Tam say\u0131 olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.<\/li>\n\n<li>is_bool($degisken): Mant\u0131ksal de\u011fer olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.<\/li>\n\n<li>is_array($degisken): Dizi olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u00d6zet ve Sonraki Ad\u0131mlar<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PHP&#8217;de de\u011fi\u015fkenler, dinamik tip yap\u0131s\u0131 ve pratik s\u00f6zdizimi sayesinde esnek bir geli\u015ftirme deneyimi sunar. Dolar i\u015faretiyle ba\u015flayan bu yap\u0131lar; skaler, bile\u015fik ve \u00f6zel veri t\u00fcrleri ile projelerinizdeki t\u00fcm veri ak\u0131\u015f\u0131n\u0131 y\u00f6netmenize imkan tan\u0131r. G\u00fcvenli ve hatas\u0131z kodlar yazmak i\u00e7in de\u011fi\u015fken t\u00fcrlerini do\u011fru tespit etmek ve gerekti\u011finde tip d\u00f6n\u00fc\u015f\u00fcmlerini bilin\u00e7li uygulamak b\u00fcy\u00fck \u00f6nem ta\u015f\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bir sonraki ad\u0131mda, de\u011fi\u015fkenler \u00fczerinde matematiksel ve mant\u0131ksal i\u015flemler yapman\u0131z\u0131 sa\u011flayan PHP operat\u00f6rlerini ve program ak\u0131\u015f\u0131n\u0131 kontrol eden if-else bloklar\u0131n\u0131 inceleyebilirsiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP programlama dilinde de\u011fi\u015fken yap\u0131s\u0131n\u0131, isimlendirme kurallar\u0131n\u0131 ve temel veri t\u00fcrlerini pratik kod \u00f6rnekleriyle ke\u015ffedin.<\/p>","protected":false},"author":1,"featured_media":10123,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[301],"tags":[213,305,306,302,264],"class_list":["post-10122","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","tag-php","tag-php-degiskenler","tag-veri-turleri","tag-web-gelistirme","tag-yazilim"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PHP&#039;de De\u011fi\u015fkenler ve Veri T\u00fcrleri - Yunus KAYTAN<\/title>\n<meta name=\"description\" content=\"PHP de\u011fi\u015fkenler ve veri t\u00fcrleri rehberi. De\u011fi\u015fken tan\u0131mlama kurallar\u0131, skaler ve bile\u015fik veri t\u00fcrleri ile tip d\u00f6n\u00fc\u015f\u00fcmlerini s\u0131f\u0131rdan \u00f6\u011frenin.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.yunuskaytan.com\/en\/yk\/php-de-degiskenler-ve-veri-turleri\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP&#039;de De\u011fi\u015fkenler ve Veri T\u00fcrleri - Yunus KAYTAN\" \/>\n<meta property=\"og:description\" content=\"PHP de\u011fi\u015fkenler ve veri t\u00fcrleri rehberi. De\u011fi\u015fken tan\u0131mlama kurallar\u0131, skaler ve bile\u015fik veri t\u00fcrleri ile tip d\u00f6n\u00fc\u015f\u00fcmlerini s\u0131f\u0131rdan \u00f6\u011frenin.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.yunuskaytan.com\/en\/yk\/php-de-degiskenler-ve-veri-turleri\/\" \/>\n<meta property=\"og:site_name\" content=\"Yunus KAYTAN\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-26T05:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/blog-kapak\/php-de-degiskenler-ve-veri-turleri-kapak.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"yunuskaytan\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"yunuskaytan\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/\"},\"author\":{\"name\":\"yunuskaytan\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#\\\/schema\\\/person\\\/be66986fb499da83a5685de34f68d15a\"},\"headline\":\"PHP&#8217;de De\u011fi\u015fkenler ve Veri T\u00fcrleri\",\"datePublished\":\"2026-10-26T05:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/\"},\"wordCount\":1088,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.yunuskaytan.com\\\/wp-content\\\/uploads\\\/blog-kapak\\\/php-de-degiskenler-ve-veri-turleri-kapak.jpg\",\"keywords\":[\"php\",\"php degiskenler\",\"veri turleri\",\"web gelistirme\",\"yaz\u0131l\u0131m\"],\"articleSection\":[\"PHP\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/\",\"url\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/\",\"name\":\"PHP'de De\u011fi\u015fkenler ve Veri T\u00fcrleri - Yunus KAYTAN\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.yunuskaytan.com\\\/wp-content\\\/uploads\\\/blog-kapak\\\/php-de-degiskenler-ve-veri-turleri-kapak.jpg\",\"datePublished\":\"2026-10-26T05:00:00+00:00\",\"description\":\"PHP de\u011fi\u015fkenler ve veri t\u00fcrleri rehberi. De\u011fi\u015fken tan\u0131mlama kurallar\u0131, skaler ve bile\u015fik veri t\u00fcrleri ile tip d\u00f6n\u00fc\u015f\u00fcmlerini s\u0131f\u0131rdan \u00f6\u011frenin.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.yunuskaytan.com\\\/wp-content\\\/uploads\\\/blog-kapak\\\/php-de-degiskenler-ve-veri-turleri-kapak.jpg\",\"contentUrl\":\"https:\\\/\\\/www.yunuskaytan.com\\\/wp-content\\\/uploads\\\/blog-kapak\\\/php-de-degiskenler-ve-veri-turleri-kapak.jpg\",\"width\":1200,\"height\":630,\"caption\":\"PHP'de De\u011fi\u015fkenler ve Veri T\u00fcrleri\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/yk\\\/php-de-degiskenler-ve-veri-turleri\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\\\/\\\/www.yunuskaytan.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PHP&#8217;de De\u011fi\u015fkenler ve Veri T\u00fcrleri\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#website\",\"url\":\"https:\\\/\\\/www.yunuskaytan.com\\\/\",\"name\":\"Yunus KAYTAN\",\"description\":\"Bili\u015fim, Siber G\u00fcvenlik, Siber Su\u00e7lar ve Sosyal M\u00fchendislik\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.yunuskaytan.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#organization\",\"name\":\"Bili\u015fim, Siber G\u00fcvenlik, Siber Su\u00e7lar ve Sosyal M\u00fchendislik\",\"url\":\"https:\\\/\\\/www.yunuskaytan.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.yunuskaytan.com\\\/wp-content\\\/uploads\\\/2021\\\/07\\\/cropped-BILISIM-VE-SIBER-GUVENLIK.png\",\"contentUrl\":\"https:\\\/\\\/www.yunuskaytan.com\\\/wp-content\\\/uploads\\\/2021\\\/07\\\/cropped-BILISIM-VE-SIBER-GUVENLIK.png\",\"width\":400,\"height\":109,\"caption\":\"Bili\u015fim, Siber G\u00fcvenlik, Siber Su\u00e7lar ve Sosyal M\u00fchendislik\"},\"image\":{\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.yunuskaytan.com\\\/#\\\/schema\\\/person\\\/be66986fb499da83a5685de34f68d15a\",\"name\":\"yunuskaytan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/3caae7a5e52b2c1df0cbbb777ba7b421ad4777ac947e9320b5809e2d454ffdb4?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/3caae7a5e52b2c1df0cbbb777ba7b421ad4777ac947e9320b5809e2d454ffdb4?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/3caae7a5e52b2c1df0cbbb777ba7b421ad4777ac947e9320b5809e2d454ffdb4?s=96&d=mm&r=g\",\"caption\":\"yunuskaytan\"},\"sameAs\":[\"http:\\\/\\\/www.yunuskaytan.com\"],\"url\":\"https:\\\/\\\/www.yunuskaytan.com\\\/en\\\/yk\\\/author\\\/yunuskaytan\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"PHP'de De\u011fi\u015fkenler ve Veri T\u00fcrleri - Yunus KAYTAN","description":"PHP de\u011fi\u015fkenler ve veri t\u00fcrleri rehberi. De\u011fi\u015fken tan\u0131mlama kurallar\u0131, skaler ve bile\u015fik veri t\u00fcrleri ile tip d\u00f6n\u00fc\u015f\u00fcmlerini s\u0131f\u0131rdan \u00f6\u011frenin.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.yunuskaytan.com\/en\/yk\/php-de-degiskenler-ve-veri-turleri\/","og_locale":"en_US","og_type":"article","og_title":"PHP'de De\u011fi\u015fkenler ve Veri T\u00fcrleri - Yunus KAYTAN","og_description":"PHP de\u011fi\u015fkenler ve veri t\u00fcrleri rehberi. De\u011fi\u015fken tan\u0131mlama kurallar\u0131, skaler ve bile\u015fik veri t\u00fcrleri ile tip d\u00f6n\u00fc\u015f\u00fcmlerini s\u0131f\u0131rdan \u00f6\u011frenin.","og_url":"https:\/\/www.yunuskaytan.com\/en\/yk\/php-de-degiskenler-ve-veri-turleri\/","og_site_name":"Yunus KAYTAN","article_published_time":"2026-10-26T05:00:00+00:00","og_image":[{"width":1200,"height":630,"url":"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/blog-kapak\/php-de-degiskenler-ve-veri-turleri-kapak.jpg","type":"image\/jpeg"}],"author":"yunuskaytan","twitter_card":"summary_large_image","twitter_misc":{"Written by":"yunuskaytan","Est. reading time":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/#article","isPartOf":{"@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/"},"author":{"name":"yunuskaytan","@id":"https:\/\/www.yunuskaytan.com\/#\/schema\/person\/be66986fb499da83a5685de34f68d15a"},"headline":"PHP&#8217;de De\u011fi\u015fkenler ve Veri T\u00fcrleri","datePublished":"2026-10-26T05:00:00+00:00","mainEntityOfPage":{"@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/"},"wordCount":1088,"commentCount":0,"publisher":{"@id":"https:\/\/www.yunuskaytan.com\/#organization"},"image":{"@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/#primaryimage"},"thumbnailUrl":"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/blog-kapak\/php-de-degiskenler-ve-veri-turleri-kapak.jpg","keywords":["php","php degiskenler","veri turleri","web gelistirme","yaz\u0131l\u0131m"],"articleSection":["PHP"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/","url":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/","name":"PHP'de De\u011fi\u015fkenler ve Veri T\u00fcrleri - Yunus KAYTAN","isPartOf":{"@id":"https:\/\/www.yunuskaytan.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/#primaryimage"},"image":{"@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/#primaryimage"},"thumbnailUrl":"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/blog-kapak\/php-de-degiskenler-ve-veri-turleri-kapak.jpg","datePublished":"2026-10-26T05:00:00+00:00","description":"PHP de\u011fi\u015fkenler ve veri t\u00fcrleri rehberi. De\u011fi\u015fken tan\u0131mlama kurallar\u0131, skaler ve bile\u015fik veri t\u00fcrleri ile tip d\u00f6n\u00fc\u015f\u00fcmlerini s\u0131f\u0131rdan \u00f6\u011frenin.","breadcrumb":{"@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/#primaryimage","url":"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/blog-kapak\/php-de-degiskenler-ve-veri-turleri-kapak.jpg","contentUrl":"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/blog-kapak\/php-de-degiskenler-ve-veri-turleri-kapak.jpg","width":1200,"height":630,"caption":"PHP'de De\u011fi\u015fkenler ve Veri T\u00fcrleri"},{"@type":"BreadcrumbList","@id":"https:\/\/www.yunuskaytan.com\/yk\/php-de-degiskenler-ve-veri-turleri\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Anasayfa","item":"https:\/\/www.yunuskaytan.com\/"},{"@type":"ListItem","position":2,"name":"PHP&#8217;de De\u011fi\u015fkenler ve Veri T\u00fcrleri"}]},{"@type":"WebSite","@id":"https:\/\/www.yunuskaytan.com\/#website","url":"https:\/\/www.yunuskaytan.com\/","name":"Yunus KAYTAN","description":"Information Technology, Cybersecurity, Cybercrimes and Social Engineering","publisher":{"@id":"https:\/\/www.yunuskaytan.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.yunuskaytan.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.yunuskaytan.com\/#organization","name":"Information Technology, Cybersecurity, Cybercrimes and Social Engineering","url":"https:\/\/www.yunuskaytan.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.yunuskaytan.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/07\/cropped-BILISIM-VE-SIBER-GUVENLIK.png","contentUrl":"https:\/\/www.yunuskaytan.com\/wp-content\/uploads\/2021\/07\/cropped-BILISIM-VE-SIBER-GUVENLIK.png","width":400,"height":109,"caption":"Bili\u015fim, Siber G\u00fcvenlik, Siber Su\u00e7lar ve Sosyal M\u00fchendislik"},"image":{"@id":"https:\/\/www.yunuskaytan.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.yunuskaytan.com\/#\/schema\/person\/be66986fb499da83a5685de34f68d15a","name":"yunuskaytan","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/3caae7a5e52b2c1df0cbbb777ba7b421ad4777ac947e9320b5809e2d454ffdb4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/3caae7a5e52b2c1df0cbbb777ba7b421ad4777ac947e9320b5809e2d454ffdb4?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/3caae7a5e52b2c1df0cbbb777ba7b421ad4777ac947e9320b5809e2d454ffdb4?s=96&d=mm&r=g","caption":"yunuskaytan"},"sameAs":["http:\/\/www.yunuskaytan.com"],"url":"https:\/\/www.yunuskaytan.com\/en\/yk\/author\/yunuskaytan\/"}]}},"_links":{"self":[{"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/posts\/10122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/comments?post=10122"}],"version-history":[{"count":1,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/posts\/10122\/revisions"}],"predecessor-version":[{"id":10146,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/posts\/10122\/revisions\/10146"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/media\/10123"}],"wp:attachment":[{"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/media?parent=10122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/categories?post=10122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yunuskaytan.com\/en\/wp-json\/wp\/v2\/tags?post=10122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}