A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::open($save_path, $name) should either be compatible with SessionHandlerInterface::open(string $path, string $name): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 113

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 280

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 145

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 223

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 303

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 344

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PHP

defined() Fonksiyonu ve Kullanımı

3/5

0 yorum

Hakan Taşan tarih

09 Kasım 2013

Kullanımı oldukça basit olan defined() fonksiyonu girilen değerin sabit olup olmadığını kontrol eder (bkz. sabit nasıl tanımlanır define ve sabit nasıl yazdırılır constant). 1 parametre alır o da kontrol edilecek sabitin ismidir. TRUE veya FALSE değeri döndürür. Fazla uzatmadan fonksiyonun syntax ve kullanımına geçelim.

Syntax

defined(name)

name: Kontrol edilecek sabitin ismi.

Örnek 1)

<?php
    if(defined('DENEME')) 
        echo "DENEME sabiti önceden tanımlanmış";
    else 
        echo "DENEME sabiti önceden tanımlanmamış";
    // Çıktı: "DENEME sabiti önceden tanımlanmamış"
?>

Örnek 2)

<?php
    define('DENEME','içerik');
    if(defined('DENEME')) 
        echo "DENEME sabiti: ". DENEME;
    else 
        echo "DENEME sabiti önceden tanımlanmamış";
    // Çıktı: "DENEME sabiti: içerik"
?>