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<?php $arr = array(1, 2, 3, 4); foreach ($arr as &$value) { $value = $value * 2; } var_dump($arr); // $arr is now array(2, 4, 6, 8)
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
array(4) { [0]=> int(2) [1]=> int(4) [2]=> int(6) [3]=> &int(8) }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(4) { [0]=> int(2) [1]=> int(4) [2]=> int(6) [3]=> &int(8) }
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0
array(4) { [0]=> &int(2) [1]=> &int(4) [2]=> &int(6) [3]=> &int(8) }
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/jq5TR on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/jq5TR on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/jq5TR on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/jq5TR on line 4
Process exited with code 255.

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