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
octdec
(PHP 4, PHP 5, PHP 7)
octdec — 8진수를 10진수로
인수
-
octal_string -
변환할 8진 문자열
반환값
octal_string의 10진 표현
예제
Example #1 octdec() 예제
<?php
echo octdec('77') . "\n";
echo octdec(decoct(45));
?>
위 예제의 출력:
63 45
참고
- decoct() - 10진수를 8진수로
- bindec() - 2진수를 10진수로
- hexdec() - 16진수를 10진수로
- base_convert() - 수를 임의의 진법으로 변환
add a note
User Contributed Notes 3 notes
contato at andersonfraga dot net ¶
15 years ago
Anonymous ¶
21 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"?).
harry at disgruntledgoat dot com ¶
17 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.
