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, PHP 8)
octdec — Octal a decimal
Descripción
Devuelve el valor decimal equivalente al número octal representado por el
argumento cadena_octal.
Parámetros
-
octal_string -
El string octal a convertir
Valores devueltos
La representación decimal de octal_string
Ejemplos
Ejemplo #1 Ejemplo de octdec()
<?php
echo octdec('77') . "\n";
echo octdec(decoct(45));
?>El resultado del ejemplo sería:
63 45
Notas
Nota:
Esta función puede convertir números que son demasiado grandes para caber en el tipo integer de cada plataforma, devolviendo en este caso un valor de tipo float para los valores mayores.
Ver también
- decoct() - Decimal a octal
- bindec() - Binario a decimal
- hexdec() - Hexadecimal a decimal
- base_convert() - Convertir un número entre bases arbitrarias
add a note
User Contributed Notes 3 notes
contato at andersonfraga dot net ¶
16 years ago
Anonymous ¶
22 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.
