Online PHP editor | output for Nro2k

<?php function callback($m) { return html_entity_decode("&#x$m[1];", ENT_QUOTES, 'UTF-8'); } function raw_json_encode($input, $flags = 0) { $fails = implode('|', array_filter(array( '\\\\', PHP_VERSION >= '5.3' && $flags & JSON_HEX_TAG ? 'u003[CE]' : '', PHP_VERSION >= '5.3' && $flags & JSON_HEX_AMP ? 'u0026' : '', PHP_VERSION >= '5.3' && $flags & JSON_HEX_APOS ? 'u0027' : '', PHP_VERSION >= '5.3' && $flags & JSON_HEX_QUOT ? 'u0022' : '', ))); $pattern = "/\\\\(?:(?:$fails)(*SKIP)(*FAIL)|u([0-9a-fA-F]{4}))/"; return preg_replace_callback($pattern, 'callback', PHP_VERSION >= '5.3' ? json_encode($input, $flags) : json_encode($input) ); } $data = array('あ\い\\u26A0う\\\\u26A0え\\u26A0お', '<x>& \' "</x>'); $base = PHP_VERSION >= '5.4' ? JSON_UNESCAPED_UNICODE : 0; $extra = PHP_VERSION >= '5.3' ? JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT : 0; echo 'json_encode: ', json_encode($data, $base), "\n"; echo 'raw_json_encode: ', raw_json_encode($data), "\n"; echo "\n---\n\n"; echo 'json_encode: ', json_encode($data, $base), "\n"; echo 'raw_json_encode: ', raw_json_encode($data, $extra), "\n"; echo 'raw_json_encode (redundant): ', raw_json_encode($data, $base | $extra), "\n"; /* json_encode: ["あ\\い\\u26A0う\\\\u26A0え\\u26A0お","<x>& ' \"<\/x>"] raw_json_encode: ["あ\\い\\u26A0う\\\\u26A0え\\u26A0お","<x>& ' \"<\/x>"] --- json_encode: ["あ\\い\\u26A0う\\\\u26A0え\\u26A0お","\u003Cx\u003E\u0026 \u0027 \u0022\u003C\/x\u003E"] raw_json_encode: ["あ\\い\\u26A0う\\\\u26A0え\\u26A0お","\u003Cx\u003E\u0026 \u0027 \u0022\u003C\/x\u003E"] raw_json_encode (redundant): ["あ\\い\\u26A0う\\\\u26A0え\\u26A0お","\u003Cx\u003E\u0026 \u0027 \u0022\u003C\/x\u003E"] */