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<?php $source = json_encode([new StdClass, "This is a test", "Foo's bar", 1, 5]); $escaped = implode("", array_map(function($char) { if (ctype_alnum($char)) { return $char; } $bytelen = mb_strlen($char, '8bit'); $result = '\\u'; for ($i = 0; $i < $bytelen; $i++) { $result .= str_pad(dechex(ord($char[$i])), 2, '0', STR_PAD_LEFT); } return $result; }, str_split($source, 1))); var_dump($escaped);
Output for 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(88) "\u5b\u7b\u7d\u2c\u22This\u20is\u20a\u20test\u22\u2c\u22Foo\u27s\u20bar\u22\u2c1\u2c5\u5d"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/T72Ep on line 3
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 '[', expecting ')' in /in/T72Ep on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/T72Ep on line 3
Process exited with code 255.
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273.41 ms | 401 KiB | 380 Q