PHP 7 – What changed internally?
PHP explode() Function - afgprogrammer
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PHP 7 features & improvements
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PHP 7 features & improvements
How the PHP functions "func_get_arg" and "func_get_args" changed from PHP 5.x to PHP 7.x | Our Code World
php tutorial - PHP Functions - In 30Sec by Microsoft Awarded MVP | wikitechy
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PHP 7: Features and Performance Comparison | Zend by Perforce
PHP 7.3 released; comes with support for foreign function interface
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