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run code in 150+ php & hhvm versions
Bugs & Features
<?php $contact_rec[0]=""; //The emails of the client foreach($contact as $key => $value) { if($value['email'] != null) $contact_rec[] = $value['email']; } foreach($contact_rec as $key => $value) { $contact_rec[$value] = $value; unset($contact_rec[$key]); }
Output for 5.1.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined variable: contact in /in/O30SO on line 4 Warning: Invalid argument supplied for foreach() in /in/O30SO on line 4
Output for hhvm-3.10.0 - 3.12.0
Notice: Undefined variable: contact in /in/O30SO on line 8 Warning: Invalid argument supplied for foreach() in /in/O30SO on line 8
Output for 4.3.0 - 4.3.10, 4.4.0 - 5.0.5
Warning: Invalid argument supplied for foreach() in /in/O30SO on line 4
Output for 4.3.11