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<?php // In response to http://www.php.net/manual/en/language.constants.predefined.php#113130 // In fact, you can define magic constants too. if (@__DIR__ == '__DIR__') { echo "magic __DIR__ constant NOT defined\r\n"; echo "defining __DIR__ constant\r\n"; define('__DIR__', substr(__FILE__, 0, strrpos(__FILE__, DIRECTORY_SEPARATOR))); } else { echo "magic __DIR__ constant IS defined\r\n"; } echo "result of var_dump(__DIR__):\r\n"; var_dump(__DIR__);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
magic __DIR__ constant IS defined result of var_dump(__DIR__): string(3) "/in"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
magic __DIR__ constant NOT defined defining __DIR__ constant result of var_dump(__DIR__): string(3) "/in"
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202.19 ms | 402 KiB | 310 Q