PHP 7.1.21 Released

octdec

(PHP 4, PHP 5, PHP 7)

octdec八进制转换为十进制

说明

number octdec ( string $octal_string )

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 #1 octdec() 例子

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

以上例程会输出:

63
45

参见

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User Contributed Notes 3 notes

up
6
contato at andersonfraga dot net
10 years ago
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
up
1
Anonymous
15 years ago
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"?).
up
-3
harry at disgruntledgoat dot com
11 years ago
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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