PHP data type of integer variable detailed

The integer type is Interger, and in 32-bit operating systems, the valid range is -2146483648~+2146483646. Integer values can be specified in decimal, hexadecimal, or octal, preceded by an optional symbol "-" or "+" to identify positive or negative. If you use octal notation, the number must be preceded by 0, and the hexadecimal symbol must be preceded by a 0x, as shown in program 2-5.


<? Php
$a = 123; #十进制
$b =-456; #一个负数
$c = 0135; #八进制数 (equals decimal 93)
$d =0x1b; #十六进制数 (equals decimal 27)
echo $a. " <br> ". $b." <br> ". $c." <br> ". $d;
?>

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