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imagecolorallocate

imagecolorallocate

(PHP 3, PHP 4, PHP 5)

imagecolorallocate -- Allocate a color for an image

Opis

int imagecolorallocate ( resource image, int red, int green, int blue )

Returns a color identifier representing the color composed of the given RGB components.

imagecolorallocate() must be called to create each color that is to be used in the image represented by image.

Notatka: The first call to imagecolorallocate() fills the background color in palette-based images - images created using imagecreate().

Parametry

obraz

Zasób obrazu, zwrócony przez jedną z funkcji tworzących obrazy, taką jak imagecreatetruecolor().

red

Value of red component

green

Value of green component

blue

Value of blue component

These parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

Zwracane wartości

A color identifier or FALSE if the allocation failed.

Rejestr zmian

WersjaOpis
Prior to 5.1.3 Returns -1 if the allocation failed.

Przykłady

Przykład 1. imagecolorallocate() example

<?php

$im
= imagecreate(100, 100);

// sets background to red
$background = imagecolorallocate($im, 255, 0, 0);

// sets some colors
$white = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);

// hexadecimal way
$white = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
$black = imagecolorallocate($im, 0x00, 0x00, 0x00);

?>