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)
octdec — Conversion d'octal en décimal
Description
Retourne une chaîne contenant la représentation décimale du nombre
octal_tring.
Valeurs de retour
La représentation décimale de octal_string
Historique
| Version | Description |
|---|---|
| 4.1.0 | Cette fonction peut également convertir de très grands nombres. Elle retourne un nombre de type float dans ce cas. |
Exemples
Exemple #1 Exemple avec octdec()
<?php
echo octdec('77') . "\n";
echo octdec(decoct(45));
?>
L'exemple ci-dessus va afficher :
63 45
Voir aussi
- decoct() - Convertit de décimal en octal
- bindec() - Convertit de binaire en décimal
- hexdec() - Convertit de hexadécimal en décimal
- base_convert() - Convertit un nombre entre des bases arbitraires
add a note
User Contributed Notes 3 notes
contato at andersonfraga dot net ¶
5 years ago
harry at disgruntledgoat dot com ¶
6 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.
Anonymous ¶
11 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"?).