<?php
const INT_SIGNED = 1;
const INT_LE = 2;
function isLittleEndian() {
return pack('S', 0x00FF) === "\xFF\x00";
}
function is32Bit() {
return PHP_INT_MAX < 0x80000000;
}
function unpack_int32($str, $flags = 0) {
$length = strlen($str);
if ($length < 4) {
return false;
} else if ($length > 4) {
$str = substr($str, 0, 4);
}
$format = ($flags & INT_LE) ? 'V' : 'N';
$result = current(unpack($format, $str));
if (($result & 0x80000000) && ($flags & INT_SIGNED) && !is32Bit()) {
$result = 0xFFFFFFFF00000000 | $result;
}
return $result;
}
var_dump(isLittleEndian(), is32Bit(), unpack_int32("\xFF\xFF\xFF\xFE", INT_SIGNED));
- Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- Deprecated: Implicit conversion from float 1.8446744069414584E+19 to int loses precision in /in/g4s7Y on line 25
bool(true)
bool(false)
int(-2)
- Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
- bool(true)
bool(false)
int(-2)
- Output for 5.2.3 - 5.2.17
- Parse error: syntax error, unexpected T_CONST in /in/g4s7Y on line 3
Process exited with code 255. - Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
- <br />
<b>Parse error</b>: syntax error, unexpected T_CONST in <b>/in/g4s7Y</b> on line <b>3</b><br />
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
- <br />
<b>Parse error</b>: parse error, unexpected T_CONST in <b>/in/g4s7Y</b> on line <b>3</b><br />
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- <br />
<b>Parse error</b>: parse error in <b>/in/g4s7Y</b> on line <b>3</b><br />
Process exited with code 255.
preferences:
191.63 ms | 401 KiB | 343 Q