Number is octal?
Simple and easy:
<?php
function is_octal($x) {
return decoct(octdec($x)) == $x;
}
echo is_octal(077); // true
echo is_octal(195); // false
?>
Thanks
[]'s
(PHP 4, PHP 5, PHP 7, PHP 8)
octdec — 八进制转换为十进制
$octal_string
) : number
返回 octal_string
参数所表示的八进制数的十进制等值。
octal_string要转换的八进制的字符串
octal_string 的十进制的表示
| 版本 | 说明 |
|---|---|
| 4.1.0 | 该函数可以处理 integer 大数字，这种情况下，它会返回 float 类型。 |
Example #1 octdec() 例子
<?php
echo octdec('77') . "\n";
echo octdec(decoct(45));
?>
以上例程会输出：
63 45
Number is octal?
Simple and easy:
<?php
function is_octal($x) {
return decoct(octdec($x)) == $x;
}
echo is_octal(077); // true
echo is_octal(195); // false
?>
Thanks
[]'s
Calling the sticky bit "text" is not erroneous: On UNIX back in 1974, it instructed the operating system to retain the text segment of the program in swap space after the process exited. This speeded subsequent executions by allowing the kernel to make a single operation of moving the program from swap to real memory.
The 'S' flag for Unix file access rights is badly computed in the above sample.
If the corresponding 'x' bit (exec) is not set, and the 's' bit (setgid/setuid/sticky) is set, then the flag should not be displayed as and uppercase 'S', but as a lower case 's'. Also the sticky bit (mainly used for folders with public right access rights such as /tmp to protect against deletion by non owner) is badly named ("text"?).