{"id":206,"date":"2024-04-01T12:40:30","date_gmt":"2024-04-01T09:40:30","guid":{"rendered":"https:\/\/aslihankaratas.com\/?p=206"},"modified":"2024-05-18T10:21:53","modified_gmt":"2024-05-18T07:21:53","slug":"phpde-fonksiyonlar","status":"publish","type":"post","link":"https:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/","title":{"rendered":"PHP&#8217;de Fonksiyonlar"},"content":{"rendered":"\n<p>PHP&#8217;de fonksiyonlar, belirli bir i\u015flevi ger\u00e7ekle\u015ftirmek i\u00e7in kullan\u0131lan, tekrar tekrar kullan\u0131labilen kod bloklar\u0131d\u0131r. Fonksiyonlar, kodunuzu daha mod\u00fcler hale getirmenize ve kod tekrar\u0131n\u0131 \u00f6nlemenize yard\u0131mc\u0131 olur. PHP&#8217;de bir\u00e7ok yerle\u015fik fonksiyon bulunur ve ayr\u0131ca kendi \u00f6zel fonksiyonlar\u0131n\u0131z\u0131 da tan\u0131mlayabilirsiniz.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>String Fonksiyonlar\u0131: Metin dizeleri \u00fczerinde i\u015flem yapmak i\u00e7in kullan\u0131l\u0131r. \u00d6rne\u011fin: strlen(), substr(), str_replace().<\/li>\n\n\n\n<li>Dizi Fonksiyonlar\u0131: Dizilerle \u00e7al\u0131\u015fmak i\u00e7in kullan\u0131l\u0131r. \u00d6rne\u011fin: array_push(), array_pop(), array_merge().<\/li>\n\n\n\n<li>Matematiksel Fonksiyonlar: Matematiksel i\u015flemler yapmak i\u00e7in kullan\u0131l\u0131r. \u00d6rne\u011fin: abs(), round(), sqrt().<\/li>\n\n\n\n<li>Tarih ve Zaman Fonksiyonlar\u0131: Tarih ve zamanla ilgili i\u015flemler i\u00e7in kullan\u0131l\u0131r. \u00d6rne\u011fin: date(), strtotime(), time().<\/li>\n\n\n\n<li>Dosya \u0130\u015flemleri Fonksiyonlar\u0131: Dosyalarla \u00e7al\u0131\u015fmak i\u00e7in kullan\u0131l\u0131r. \u00d6rne\u011fin: file_get_contents(), file_put_contents(), fopen().<\/li>\n\n\n\n<li>Veritaban\u0131 Fonksiyonlar\u0131: Veritaban\u0131 i\u015flemleri yapmak i\u00e7in kullan\u0131l\u0131r. \u00d6rne\u011fin: mysqli_query(), mysqli_fetch_assoc(), mysqli_connect().<\/li>\n<\/ol>\n\n\n\n<p>Kullan\u0131m \u015fekli<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n\/\/ Fonksiyon tan\u0131m\u0131\nfunction merhaba_dunya() {\n    echo \"Merhaba, D\u00fcnya!\";\n}\n\n\/\/ Fonksiyon \u00e7a\u011fr\u0131s\u0131\nmerhaba_dunya(); \/\/ \u00c7\u0131kt\u0131: Merhaba, D\u00fcnya!\n?&gt;<\/code><\/pre>\n\n\n\n<p>\u00d6rnek: De\u011fi\u015fkene verilen de\u011ferin fakt\u00f6riyelini hesaplayan php kodunu yazal\u0131m.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n\/\/ Fonksiyon tan\u0131m\u0131\nfunction faktoriyel($sayi) {\n    \/\/ E\u011fer say\u0131 1'den k\u00fc\u00e7\u00fck veya e\u015fitse, fakt\u00f6riyel 1'dir.\n    if ($sayi &lt;= 1) {\n        return 1;\n    } else {\n        \/\/ Say\u0131n\u0131n fakt\u00f6riyeli, say\u0131 ile (say\u0131-1) fakt\u00f6riyeli aras\u0131ndaki \u00e7arp\u0131m\u0131d\u0131r.\n        return $sayi * faktoriyel($sayi - 1);\n    }\n}\n\n\/\/ Fonksiyon \u00e7a\u011fr\u0131s\u0131 ve sonucun kullan\u0131m\u0131\n$sayi = 5;\n\/\/ Fonksiyon \u00e7a\u011fr\u0131s\u0131, fakt\u00f6riyel hesaplama ve sonucun ekrana yazd\u0131r\u0131lmas\u0131\necho \"Faktoriyel($sayi): \" . faktoriyel($sayi);\n?&gt;\n<\/code><\/pre>\n\n\n\n<p>\u00d6rnek: De\u011fi\u015fkenine verilen de\u011fer aral\u0131\u011f\u0131nda yer alan asal say\u0131lar\u0131 bulup ekrana yazd\u0131ran php kodunu yazal\u0131m.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;?php\n\/\/ Fonksiyon tan\u0131m\u0131: Bir say\u0131n\u0131n asal olup olmad\u0131\u011f\u0131n\u0131 kontrol eder\nfunction asalMi($sayi) {\n    \/\/ E\u011fer say\u0131 1 veya daha k\u00fc\u00e7\u00fckse asal de\u011fildir.\n    if ($sayi &lt;= 1) {\n        return false;\n    }\n    \n    \/\/ 2'den ba\u015flayarak say\u0131n\u0131n karek\u00f6k\u00fcne kadar olan say\u0131larla b\u00f6l\u00fcn\u00fcp b\u00f6l\u00fcnmedi\u011fini kontrol et\n    \/\/ E\u011fer bir say\u0131 asal de\u011filse, en b\u00fcy\u00fck b\u00f6leni say\u0131n\u0131n karek\u00f6k\u00fcnden k\u00fc\u00e7\u00fck veya e\u015fit olacakt\u0131r.\n    \/\/ Bu y\u00fczden b\u00f6lenler karek\u00f6k\u00fcne kadar kontrol edilir.\n    for ($i = 2; $i &lt;= sqrt($sayi); $i++) {\n        if ($sayi % $i == 0) {\n            return false; \/\/ E\u011fer say\u0131 b\u00f6l\u00fcn\u00fcyorsa, asal de\u011fildir.\n        }\n    }\n    \n    \/\/ Yukar\u0131daki ko\u015fullardan hi\u00e7birine uymazsa, say\u0131 asald\u0131r.\n    return true;\n}\n\n\/\/ Fonksiyon tan\u0131m\u0131: Belirli bir aral\u0131ktaki asal say\u0131lar\u0131 bulup ekrana yazd\u0131r\u0131r\nfunction asalSayilariYazdir($baslangic, $bitis) {\n    echo \"Asal Say\u0131lar ($baslangic - $bitis): \";\n    \/\/ Belirli aral\u0131ktaki her bir say\u0131y\u0131 kontrol eder\n    for ($i = $baslangic; $i &lt;= $bitis; $i++) {\n        \/\/ Her bir say\u0131n\u0131n asal olup olmad\u0131\u011f\u0131n\u0131 kontrol eder\n        if (asalMi($i)) {\n            echo $i . \" \"; \/\/ Asal olanlar\u0131 ekrana yazd\u0131r\u0131r\n        }\n    }\n}\n\n\/\/ Fonksiyon \u00e7a\u011fr\u0131s\u0131: 1 ile 100 aras\u0131ndaki asal say\u0131lar\u0131 bulup ekrana yazd\u0131r\u0131r\nasalSayilariYazdir(1, 100);\n?&gt;\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>PHP&#8217;de fonksiyonlar, belirli bir i\u015flevi ger\u00e7ekle\u015ftirmek i\u00e7in kullan\u0131lan, tekrar tekrar kullan\u0131labilen kod bloklar\u0131d\u0131r. Fonksiyonlar, kodunuzu daha mod\u00fcler hale getirmenize ve kod tekrar\u0131n\u0131 \u00f6nlemenize yard\u0131mc\u0131 olur. PHP&#8217;de bir\u00e7ok yerle\u015fik fonksiyon bulunur ve ayr\u0131ca kendi \u00f6zel fonksiyonlar\u0131n\u0131z\u0131 da tan\u0131mlayabilirsiniz. Kullan\u0131m \u015fekli \u00d6rnek: De\u011fi\u015fkene verilen de\u011ferin fakt\u00f6riyelini hesaplayan php kodunu yazal\u0131m. \u00d6rnek: De\u011fi\u015fkenine verilen de\u011fer aral\u0131\u011f\u0131nda yer alan asal say\u0131lar\u0131 bulup ekrana yazd\u0131ran php kodunu yazal\u0131m.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-206","post","type-post","status-publish","format-standard","hentry","category-genel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PHP&#039;de Fonksiyonlar - ASLIHAN KARATA\u015e<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP&#039;de Fonksiyonlar - ASLIHAN KARATA\u015e\" \/>\n<meta property=\"og:description\" content=\"PHP&#8217;de fonksiyonlar, belirli bir i\u015flevi ger\u00e7ekle\u015ftirmek i\u00e7in kullan\u0131lan, tekrar tekrar kullan\u0131labilen kod bloklar\u0131d\u0131r. Fonksiyonlar, kodunuzu daha mod\u00fcler hale getirmenize ve kod tekrar\u0131n\u0131 \u00f6nlemenize yard\u0131mc\u0131 olur. PHP&#8217;de bir\u00e7ok yerle\u015fik fonksiyon bulunur ve ayr\u0131ca kendi \u00f6zel fonksiyonlar\u0131n\u0131z\u0131 da tan\u0131mlayabilirsiniz. Kullan\u0131m \u015fekli \u00d6rnek: De\u011fi\u015fkene verilen de\u011ferin fakt\u00f6riyelini hesaplayan php kodunu yazal\u0131m. \u00d6rnek: De\u011fi\u015fkenine verilen de\u011fer aral\u0131\u011f\u0131nda yer alan asal say\u0131lar\u0131 bulup ekrana yazd\u0131ran php kodunu yazal\u0131m.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/\" \/>\n<meta property=\"og:site_name\" content=\"ASLIHAN KARATA\u015e\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-01T09:40:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-18T07:21:53+00:00\" \/>\n<meta name=\"author\" content=\"aslihankaratas\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"aslihankaratas\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/\",\"url\":\"https:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/\",\"name\":\"PHP'de Fonksiyonlar - ASLIHAN KARATA\u015e\",\"isPartOf\":{\"@id\":\"https:\/\/aslihankaratas.com\/#website\"},\"datePublished\":\"2024-04-01T09:40:30+00:00\",\"dateModified\":\"2024-05-18T07:21:53+00:00\",\"author\":{\"@id\":\"https:\/\/aslihankaratas.com\/#\/schema\/person\/28b7a61160b8d1bb18a217d5f1e856d4\"},\"breadcrumb\":{\"@id\":\"https:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\/\/aslihankaratas.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PHP&#8217;de Fonksiyonlar\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/aslihankaratas.com\/#website\",\"url\":\"https:\/\/aslihankaratas.com\/\",\"name\":\"ASLIHAN KARATA\u015e\",\"description\":\"Lecturer\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/aslihankaratas.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"tr\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/aslihankaratas.com\/#\/schema\/person\/28b7a61160b8d1bb18a217d5f1e856d4\",\"name\":\"aslihankaratas\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"tr\",\"@id\":\"https:\/\/aslihankaratas.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/9b9ff8326f9ce8f3ae3e5c45df92cb1c62be24345bd251cd5a84bbe607b592b7?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/9b9ff8326f9ce8f3ae3e5c45df92cb1c62be24345bd251cd5a84bbe607b592b7?s=96&d=mm&r=g\",\"caption\":\"aslihankaratas\"},\"sameAs\":[\"http:\/\/aslihankaratas.com\"],\"url\":\"https:\/\/aslihankaratas.com\/index.php\/author\/aslihankaratas\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"PHP'de Fonksiyonlar - ASLIHAN KARATA\u015e","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:\/\/aslihankaratas.com\/index.php\/2024\/04\/01\/phpde-fonksiyonlar\/","og_locale":"tr_TR","og_type":"article","og_title":"PHP'de Fonksiyonlar - ASLIHAN KARATA\u015e","og_description":"PHP&#8217;de fonksiyonlar, belirli bir i\u015flevi ger\u00e7ekle\u015ftirmek i\u00e7in kullan\u0131lan, tekrar tekrar kullan\u0131labilen kod bloklar\u0131d\u0131r. 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