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run code in 300+ PHP versions simultaneously
<?php // wp-includes/functions.php:L6630 $overloaded = function_exists( 'mb_internal_encoding' ) && ( ini_get( 'mbstring.func_overload' ) & 2 ); var_dump($overloaded); $overloaded = function_exists( 'mb_internal_encoding' ) && ( ini_get( 'dont_exist' ) & 2 ); var_dump($overloaded); // wp-includes/pomo/streams.php:L21 $overloaded = ( ( ini_get( 'mbstring.func_overload' ) & 2 ) != 0 ) && function_exists( 'mb_substr' ); var_dump($overloaded); $overloaded = ( ( ini_get( 'dont_exist' ) & 2 ) != 0 ) && function_exists( 'mb_substr' ); var_dump($overloaded);
based on ZhSff
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, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.23, 7.4.0 - 7.4.11, 8.0.0alpha1 - rc2
bool(false) bool(false) bool(false) bool(false)