IMPRESS dotted_line CONTACT dotted_line search dotted_line Kontakt dotted_line sitemap dotted_line print
365 PHP-Resource users online

Switch to another languags Deutsch aktuelle Sprache Englisch
php-resource

PHP Manual


imagecolorallocate

(PHP 4, PHP 5)

imagecolorallocateAllocate a color for an image

Description

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.

Note:

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

Parameters

image

An image resource, returned by one of the image creation functions, such as 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.

Return Values

A color identifier or FALSE if the allocation failed.

Warning

This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

Changelog

Version Description
5.1.3 Returns FALSE if the allocation failed. Previously -1 was returned.

Examples

Example #1 imagecolorallocate() example

<?php

$im 
imagecreate(100100);

// sets background to red
$background imagecolorallocate($im25500);

// sets some colors
$white imagecolorallocate($im255255255);
$black imagecolorallocate($im000);

// hexadecimal way
$white imagecolorallocate($im0xFF0xFF0xFF);
$black imagecolorallocate($im0x000x000x00);

?>

See Also




Comments to the PHP manual
Write new comment
 



 

New Tutorial entries

Migration einer PHP 5 App auf PHP 7

Dieses PHP 7 Tutorial zeigt dir, wie du dein PHP5 Script auf PHP7 umstellst.

Berni | Category: PHP
PHP 7 Virtual Machine

Dieser Artikel zielt darauf ab, einen Überblick über die Zend Virtual Machine, wie es in PHP 7 gefunden wird.

Berni | Category: PHP
plotting masters - a professional guide - Teil II

Grafische Interpolation und Bestapproximation von numerischen Wertepaaren: Wir wollen Punkte auf einer Zeichenebene über verschiedene Verfahren miteinander verbinden.

EVAMasters | Category: PHP