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run code in 150+ php & hhvm versions
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<?phpfor ( $i = 0; $i < 1000000; $i++ ) { if ( @$_GET['var'] != '' ) echo 'foo'; }
Output for 5.3.0 - 5.4.32
<?phpfor ( $i = 0; $i < 1000000; $i++ ) { if ( @$_GET['var'] != '' ) echo 'foo'; }