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run code in 300+ PHP versions simultaneously
<?php $a1 = array('first'=>'bob', 'last'=>'jones', 'age'=>'48'); $a2 = array('first'=>'sam', 'last'=>'smith', 'age'=>'41'); $a4 = array('first'=>'joe', 'last'=>'johnson', 'age'=>'33'); $a5 = array_merge_recursive($a1,$a2,$a4); print_r($a5);
Output for 5.6.0 - 5.6.27, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [first] => Array ( [0] => bob [1] => sam [2] => joe ) [last] => Array ( [0] => jones [1] => smith [2] => johnson ) [age] => Array ( [0] => 48 [1] => 41 [2] => 33 ) )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [first] => Array ( [0] => bob [1] => sam [2] => joe ) [last] => Array ( [0] => jones [1] => smith [2] => johnson ) [age] => Array ( [0] => 48 [1] => 41 [2] => 33 ) )

preferences:
204.22 ms | 402 KiB | 202 Q