3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); $arrayKey = '[0][1]'; $a[0][1] = "two levels deep"; function get( $string, $vars ) { $keys = explode( '][', substr( $string, 1, -1 ) ); foreach( $keys as $key ) { $vars = $vars[$key]; } return $vars; } echo get($arrayKey, $vars );
Output for 8.3.0 - 8.3.7
Warning: Undefined variable $vars in /in/uQoMp on line 17 Warning: Trying to access array offset on null in /in/uQoMp on line 12 Warning: Trying to access array offset on null in /in/uQoMp on line 12
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Warning: Undefined variable $vars in /in/uQoMp on line 17 Warning: Trying to access array offset on value of type null in /in/uQoMp on line 12 Warning: Trying to access array offset on value of type null in /in/uQoMp on line 12
Output for 7.4.0 - 7.4.33
Notice: Undefined variable: vars in /in/uQoMp on line 17 Notice: Trying to access array offset on value of type null in /in/uQoMp on line 12 Notice: Trying to access array offset on value of type null in /in/uQoMp on line 12
Output for 7.3.32 - 7.3.33
Output for 5.0.4 - 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31
Notice: Undefined variable: vars in /in/uQoMp on line 17
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: vars in /in/uQoMp on line 17
preferences:
206.15 ms | 402 KiB | 311 Q