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<?php $fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple"); function test_alter(&$item1, $key, $prefix) { $item1 = "$item1 : $prefix"; } function test_print($item2, $key) { echo "$key. $item2\n"; } echo "Before ...:\n"; array_walk($fruits, 'test_print'); // array_walk($fruits, 'test_alter', 'fruit'); echo "... and after:\n"; array_walk($fruits, 'test_print'); ?>
Output for 5.5.0 - 5.5.38, 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, 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
Before ...: d. lemon a. orange b. banana c. apple ... and after: d. lemon a. orange b. banana c. apple
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 Before ...: d. lemon a. orange b. banana c. apple ... and after: d. lemon a. orange b. banana c. apple
preferences:
255.35 ms | 402 KiB | 330 Q