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<?php $array = array( 'val1', 'val2', 'val3', 'val4', 'val5', ); print_out( $array ); array_walk( $array, function( &$value, &$key ){ $tmp =& $value; $value = array( 'rule' => 'ctype_alnum', ); $key = $tmp; }); function print_out( $val ) { echo '<pre>'; var_dump( $val ); echo '</pre>'; } print_out( $array );
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<pre>array(5) { [0]=> string(4) "val1" [1]=> string(4) "val2" [2]=> string(4) "val3" [3]=> string(4) "val4" [4]=> string(4) "val5" } </pre> Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 9 Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 9 Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 9 Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 9 Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 9 <pre>array(5) { [0]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [1]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [2]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [3]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [4]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } } </pre>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
<pre>array(5) { [0]=> string(4) "val1" [1]=> string(4) "val2" [2]=> string(4) "val3" [3]=> string(4) "val4" [4]=> string(4) "val5" } </pre> Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 15 Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 15 Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 15 Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 15 Warning: {closure}(): Argument #2 ($key) must be passed by reference, value given in /in/sZ0pI on line 15 <pre>array(5) { [0]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [1]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [2]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [3]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [4]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } } </pre>
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
<pre>array(5) { [0]=> string(4) "val1" [1]=> string(4) "val2" [2]=> string(4) "val3" [3]=> string(4) "val4" [4]=> string(4) "val5" } </pre><pre>array(5) { [0]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [1]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [2]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [3]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } [4]=> array(1) { ["rule"]=> string(11) "ctype_alnum" } } </pre>
Output for 5.2.3 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/sZ0pI on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected T_FUNCTION in <b>/in/sZ0pI</b> on line <b>9</b><br />
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, 5.0.0 - 5.0.5
<br /> <b>Parse error</b>: parse error, unexpected T_FUNCTION in <b>/in/sZ0pI</b> on line <b>9</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/sZ0pI</b> on line <b>9</b><br />
Process exited with code 255.

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