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  • octdec()

    (PHP 4, PHP 5, PHP 7)

    八进制转换为十进制

    说明

    octdec(string $octal_string):number

    返回$octal_string参数所表示的八进制数的十进制等值。

    参数

    $octal_string

    要转换的八进制的字符串

    返回值

    $octal_string的十进制的表示

    更新日志

    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。

    范例

    Example #1octdec()例子

    <?php
    echo octdec('77') . "\n";
    echo octdec(decoct(45));
    ?>
    

    以上例程会输出:

    63
    45
    

    参见

    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
    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"?).
    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.

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