3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array_1 = array( 'apple'=>1,'banana'=>2,'coconut'=> 3); $array_2 = array( 'apple'=>2,'banana'=>3,'coconut'=> 4); foreach( $array_1 as $fruit => $num) { if(array_key_exists($fruit, $array_2)){ //check if key from array_1 exists in array_2 $final_array[] = array($fruit => $array_1[$fruit].','.$array_2[$fruit]); //concatenate values from shared key } } print_r (final_array);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "final_array" in /in/Uiam0:11 Stack trace: #0 {main} thrown in /in/Uiam0 on line 11
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant final_array - assumed 'final_array' (this will throw an Error in a future version of PHP) in /in/Uiam0 on line 11 final_array
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 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, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant final_array - assumed 'final_array' in /in/Uiam0 on line 11 final_array
preferences:
201.65 ms | 404 KiB | 314 Q