3v4l.org

run code in 300+ PHP versions simultaneously
<?php // Array representing a possible record set returned from a database $records = array( array( 'id' => "bbb", 'first_name' => 'John', 'last_name' => 'Doe', ), array( 'id' => "aaa", 'first_name' => 'Sally', 'last_name' => array( 'id' => "zzz", 'first_name' => 'Sully', 'last_name' => 'Smith', ), ), array( 'id' => "yyy", 'first_name' => 'Jane', 'last_name' => 'Jones', ), array( 'id' => "xxx", 'first_name' => 'Peter', 'last_name' => 'Doe', ) ); function test_print($val, $key, &$third) { // var_export($val); // var_export($key); // var_export($third); // $third++; if($key == 'first_name'){ $third[] = $val; } } $third = []; array_walk_recursive($records, 'test_print', $third); print_r($third);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Array ( )
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 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Warning: test_print(): Argument #3 ($third) must be passed by reference, value given in /in/pLkot on line 43 Array ( )
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Array ( )
preferences:
209.98 ms | 403 KiB | 287 Q