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run code in 200+ php & hhvm versions
Bugs & Features
<?php function bar() { } function foo() { echo 'X'; restore_error_handler(); } set_error_handler('bar'); set_error_handler('foo'); foo(); $a = $b; print_r( set_error_handler('var_dump') );
based on FE0pk
Output for 4.3.0 - 7.1.7
Xbar