PHP pack() Funksie
❮ PHP Misc Reference
Voorbeeld
Pak data in 'n binêre string:
<?php
echo pack("C3",80,72,80);
?>
Definisie en gebruik
Die pack()-funksie pak data in 'n binêre string.
Sintaksis
Parameterwaardes
| Parameter |
Description |
| format |
Required. Specifies the format to use when packing data.
Possible values:
- a - NUL-padded string
- A - SPACE-padded string
- h - Hex string, low nibble first
- H - Hex string, high nibble first
- c - signed char
- C - unsigned char
- s - signed short (always 16 bit, machine byte order)
- S - unsigned short (always 16 bit, machine byte order)
- n - unsigned short (always 16 bit, big endian byte order)
- v - unsigned short (always 16 bit, little endian byte order)
- i - signed integer (machine dependent size and byte order)
- I - unsigned integer (machine dependent size and byte order)
- l - signed long (always 32 bit, machine byte order)
- L - unsigned long (always 32 bit, machine byte order)
- N - unsigned long (always 32 bit, big endian byte order)
- V - unsigned long (always 32 bit, little endian byte order)
- q - signed long long (always 64 bit, machine byte order)
- Q - unsigned long long (always 64 bit, machine byte order)
- J - unsigned long long (always 64 bit, big endian byte order)
- P - unsigned long long (always 64 bit, little endian byte order)
- f - float (machine dependent size and representation)
- g - float (machine dependent size, little endian byte order)
- G - float (machine dependent size, big endian byte order)
- d - double (machine dependent size and representation)
- e - double (machine dependent size, little endian byte order)
- E - double (machine dependent size, big endian byte order)
- x - NUL byte
- X - Back up one byte
- Z - NUL-padded string
- @ - NUL-fill to absolute position
|
| args+ |
Optional. Specifies one or more arguments to be packed |
Tegniese besonderhede
| Terugkeerwaarde: |
Wys data in 'n binêre string |
| PHP weergawe: |
4+ |
| Veranderinglog: |
PHP 7.2 - float en double ondersteun nou beide groot en klein endian.
PHP 7.0.15 - Die "E", "e", "G", "g" kode is bygevoeg.
PHP 5.6.3 - Die "Q", "q", "J", "P" kode is bygevoeg.
PHP 5.5 - Die "Z"-kode is bygevoeg (behou dieselfde funksionaliteit as "a" vir Perl-versoenbaarheid). |
Meer voorbeelde
Voorbeeld
Pak data in 'n binêre string:
<?php
echo pack("C*",80,72,80);
?>
❮ PHP Misc Reference
