3v4l.org

run code in 300+ PHP versions simultaneously
<?php $origin = ['value1', 'value2', 'value3', '-2', '2', '22']; $replace_map = [ 'value1' => 'replace1', 'value2' => 'replace2', 'value8' => 'replace8', 2 => 77 ]; var_export( preg_replace_callback( '~^-?\K.*$~', function ($m) use ($replace_map) { return $replace_map[$m[0]] ?? $m[0]; }, $origin ) ); var_export( preg_replace_callback('~^-?\K.*$~', fn($m)=> $replace_map[$m[0]] ?? $m[0], $origin) );
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array ( 0 => 'replace1', 1 => 'replace2', 2 => 'value3', 3 => '-77', 4 => '77', 5 => '22', )array ( 0 => 'replace1', 1 => 'replace2', 2 => 'value3', 3 => '-77', 4 => '77', 5 => '22', )
Output for 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ')' in /in/uSNDj on line 23
Process exited with code 255.
preferences:
96.29 ms | 407 KiB | 5 Q