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<?php $match = preg_replace('/(?<=^|[\x09\x20\x2D])./e', 'strtoupper("\0")', "Test test1"); var_dump($match); $match = preg_replace_callback('/(?<=^|[\x09\x20\x2D])./', function($matches) {return strtoupper($matches[0]);}, "Test-test1"); var_dump($match);
Output for 7.0.0 - 7.1.0
Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /in/I7E1D on line 3 NULL string(10) "Test-Test1"
Output for 5.5.0 - 5.6.28
Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /in/I7E1D on line 3 string(10) "Test Test1" string(10) "Test-Test1"
Output for 5.3.0 - 5.4.45
string(10) "Test Test1" string(10) "Test-Test1"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/I7E1D on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/I7E1D on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/I7E1D on line 7
Process exited with code 255.