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<?php $test = "Test-test1"; $match = preg_replace('/(?<=^|[\x09\x20\x2D])./e', 'strtoupper("\0")', $test); var_dump($match); $match = preg_replace_callback('/(?<=^|[\x09\x20\x2D])./', function($matches) {return strtoupper($matches[0]);}, $test); var_dump($match);
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /in/GJnb3 on line 5 NULL string(10) "Test-Test1"
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /in/GJnb3 on line 5 string(10) "Test-Test1" string(10) "Test-Test1"
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
string(10) "Test-Test1" string(10) "Test-Test1"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/GJnb3 on line 9
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
Parse error: parse error, unexpected T_FUNCTION in /in/GJnb3 on line 9
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/GJnb3 on line 9
Process exited with code 255.
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