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<?php class utils { public static function replace_unicode_escape_sequence($match) { return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE'); } } $str = '{"name":"F\u00f6retag: Betalning"}'; echo preg_replace_callback('/\\\\u([0-9a-f]{4})/i', 'utils.replace_unicode_escape_sequence', $str);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: preg_replace_callback(): Argument #2 ($callback) must be a valid callback, function "utils.replace_unicode_escape_sequence" not found or invalid function name in /in/lUlrd:10 Stack trace: #0 /in/lUlrd(10): preg_replace_callback('/\\\\u([0-9a-f]{4...', 'utils.replace_u...', '{"name":"F\\u00f...') #1 {main} thrown in /in/lUlrd on line 10
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: preg_replace_callback(): Requires argument 2, 'utils.replace_unicode_escape_sequence', to be a valid callback in /in/lUlrd on line 10 {"name":"F\u00f6retag: Betalning"}
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: preg_replace_callback(): requires argument 2, 'utils.replace_unicode_escape_sequence', to be a valid callback in /in/lUlrd on line 10 {"name":"F\u00f6retag: Betalning"}
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/lUlrd on line 4
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
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/lUlrd on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/lUlrd on line 4
Process exited with code 255.
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