Number is octal?
Simple and easy:
<?php
function is_octal($x) {
return decoct(octdec($x)) == $x;
}
echo is_octal(077); // true
echo is_octal(195); // false
?>
Thanks
[]'s
(PHP 4, PHP 5, PHP 7)
octdec — Conversion d'octal en décimal
Retourne une chaîne contenant la représentation décimale du nombre
octal_string
.
La représentation décimale de octal_string
Exemple #1 Exemple avec octdec()
<?php
echo octdec('77') . "\n";
echo octdec(decoct(45));
?>
L'exemple ci-dessus va afficher :
63 45
Note:
La fonction peut convertir des nombres qui sont trop larges pour tenir dans un type entier ; dans ce cas, ces valeurs seront retournées sous la forme de nombres à virgule flottante.
Number is octal?
Simple and easy:
<?php
function is_octal($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.