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run code in 150+ php & hhvm versions
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<?php $matches = array(); $value = '#12 3ff;'; $tempval = preg_replace('/&#(\d+);?/me', "chr('\\1')", $value); //"' $tempval = preg_replace('/&#x([0-9a-f]+);?/mei', "chr(hexdec('\\1'))", $tempval); var_dump($tempval); $tempval2 = preg_replace_callback('/&#(\d+);?/m', function($matches) { return chr($matches[1]); }, $value); $value2 = preg_replace_callback('/&#x([0-9a-f]+);?/mi', function($matches) { return chr(hexdec($matches[1])); }, $tempval2); var_dump($value2);
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/XKDrg on line 7 Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /in/XKDrg on line 8 NULL string(8) "#12 3ff;"
Output for 5.3.0 - 5.4.45, hhvm-3.12.0
string(8) "#12 3ff;" string(8) "#12 3ff;"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.5.24 - 5.6.28
Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /in/XKDrg on line 7 Deprecated: preg_replace(): The /e modifier is deprecated, use preg_replace_callback instead in /in/XKDrg on line 8 string(8) "#12 3ff;" string(8) "#12 3ff;"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/XKDrg on line 11
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/XKDrg on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/XKDrg on line 11
Process exited with code 255.