In php, how to get the low and high values ​​of an integer value?

Integer values ​​can be represented in decimal, hexadecimal, octal or binary, and can be preceded by an optional sign (- or +).

Binary representation of integer is available since PHP 5.4.0.

To use octal expression, 0 (zero) must be added before the number. To use hexadecimal representation, the number must be preceded by 0x. To use binary representation, 0b must be added before the number.

The following is an example of how to obtain the low and high values ​​of an integer value in PHP?

<?php
header("Content-type:text/html;charset=&#39;utf-8&#39;");
$number=123334;  //整型数字
for($i=0;$i<strlen($number);$i++){
$array[]=substr($number,$i,1);   //将数字当成字符串，将数字分离个位数存到数组中
}
echo "最低位是".$array[count($array)-1]."<br>";//数组中的最后一位是最低位
echo "最高位是".$array[0];  //数组中的第一位是最高位
?>

Output result is: the lowest level is 4
The highest bit is 1

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