<?php
function parse_literal($str) {
$str = (string)$str;
if (((string)(int)$str) === $str) {
return (int)$str;
} else if (((string)(float)$str) === $str) {
return (float)$str;
} else if (0 === strcasecmp($str, 'true')) {
return true;
} else if (0 === strcasecmp($str, 'false')) {
return false;
} else if (0 === strcasecmp($str, 'null')) {
return false;
} else if (preg_match('<^"((?:[^"\\\\]|\\\\.)*)"|\'((?:[^\'\\\\]|\\\\.)*)\'$>', $str)) {
return eval('return ' . $str . ';');
}
}
var_dump(parse_literal('12'));
var_dump(parse_literal('12.34'));
var_dump(parse_literal('true'));
var_dump(parse_literal('false'));
var_dump(parse_literal('null'));
var_dump(parse_literal('"hello world"'));
var_dump(parse_literal('"string with \" quote and escape sequences\r\n"'));
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.29 - 7.2.33, 7.3.16 - 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 - 8.3.7
- int(12)
float(12.34)
bool(true)
bool(false)
bool(false)
string(11) "hello world"
string(42) "string with " quote and escape sequences
"
preferences:
251.47 ms | 406 KiB | 309 Q