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<?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 git.master, git.master_jit, rfc.property-hooks
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.

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