超越PHP - Exceed PHP: imagecreate

imagecreate

(PHP 3, PHP 4 , PHP 5)

imagecreate -- 新建一个基于调色板的图像

说明

resource imagecreate ( int x_size, int y_size)

imagecreate() 返回一个图像标识符，代表了一幅大小为 x_size 和 y_size 的空白图像。

例子 1. 新建一个新的 GD 图像流并输出图像

<?php header ("Content-type: image/png"); $im = @imagecreate (50, 100) or die ("Cannot Initialize new GD image stream"); $background_color = imagecolorallocate ($im, 255, 255, 255); $text_color = imagecolorallocate ($im, 233, 14, 91); imagestring ($im, 1, 5, 5, "A Simple Text String", $text_color); imagepng ($im); imagedestroy ($im); ?>

参见 imagedestroy() 和 imagecreatetruecolor()。

add a note User Contributed Notes
imagecreate

scott at mha dot ca
10-Feb-2000 03:49

okay .. listen .. if you are getting fatal errors attempting to use
ImageCreate() then you most probably do not have GD installed .. Likewise,
if you are getting fatal errors attempting to use ImageGIF() then you are
most probably using a version of GD which does not support the GIF format. 
Notice that in both of these examples that the problem has nothing to do
with PHP or whether or not PHP "supports" any particular
function.  You must have the GD image library installed to make images
work.  It is as simple as that.  Furthermore, although current versions of
GD do NOT support the GIF format, I know that old versions of GD (ie.
version 1.3) do support the GIF format but they are probably illegal to use
now because of the fuss that unisys has been making about it.

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