3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $fields = array( 'socios_alta', 'socios_baja', 'socios_baja_web', 'no_socios_alta', 'no_socios_baja', 'socios_hcm_alta', 'boletin_alta', 'boletin_baja' ); if(array_key_exists($field, $fields)) echo "existe";
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: field in /in/S7q1M on line 14
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: field in /in/S7q1M on line 14