# First create a file that will build the image calling it submit.php
<?
if ($str == "Submit!") { $width = 68; $heigth = 20; }
else { $width = 86; $heigth = 20; }
Header("Content-type: image/gif");
$image = ImageCreate($width,$heigth);
$light_blue = ImageColorAllocate($image,0,153,255);
$dark_blue = ImageColorAllocate($image,0,0,255);
imagestring($image,5,4,2,$str,$dark_blue);
ImageGif($image);
ImageDestroy($image);
?>
# Next create a test page calling it test.html
<?
if (!isset($set)) { $str = "Submit!"; }
else { $str = "Continue!"; }
$no_cashe = date("hi");
?>
<FORM ACTION="<? echo $PHP_SELF; ?>">
<INPUT TYPE="hidden" NAME="set" VALUE="1">
<CENTER>
<INPUT TYPE="image"
SRC="submit.php?str=<? echo $str; ?>&<? echo $no_cashe; ?>"
ALT="<? echo $str; ?>">
</CENTER>
</FORM>
# Lastly point your web browser at http://www.your.domain.com/test.html
Demo!
These functions are only available if PHP was configured with:
--with-gd=/usr/local/gd1.3
Download and untar this file in the /usr/local directory:
http://www.linuxguruz.org/downloads/gd1.3.tar.gz
cd /usr/local
tar -xvzf gd1.3.tar.gz
cd gd1.3
make all
# Then reconfigure PHP with --with-gd=/usr/local/gd1.3
# PHP Image functions.
array getimagesize(string imagefile [, array info])
Get the size of an image as 4-element array
int imagearc(int im, int cx, int cy, int w, int h, int s, int e, int col)
Draw a partial ellipse
int imagechar(int im, int font, int x, int y, string c, int col)
Draw a character
int imagecharup(int im, int font, int x, int y, string c, int col)
Draw a character rotated 90 degrees counter-clockwise
int imagecolorallocate(int im, int red, int green, int blue)
Allocate a color for an image
int imagecolorat(int im, int x, int y)
Get the index of the color of a pixel
int imagecolorclosest(int im, int red, int green, int blue)
Get the index of the closest color to the specified color
int imagecolorclosesthwb(int im, int red, int green, int blue)
Get the index of the color which has the hue, white and blackness
nearest to the given color
int imagecolordeallocate(int im, int index)
De-allocate a color for an image
int imagecolorexact(int im, int red, int green, int blue)
Get the index of the specified color
int imagecolorresolve(int im, int red, int green, int blue)
Get the index of the specified color or its closest possible alternative
int imagecolorset(int im, int col, int red, int green, int blue)
Set the color for the specified palette index
array imagecolorsforindex(int im, int col)
Get the colors for an index
int imagecolorstotal(int im)
Find out the number of colors in an image's palette
int imagecolortransparent(int im [, int col])
Define a color as transparent
int imagecopy(int dst_im, int src_im, int dst_x, int
dst_y, int src_x, int src_y, int src_w, int src_h)
Copy part of an image
int imagecopymerge(int src_im, int dst_im, int dst_x, int
dst_y, int src_x, int src_y, int src_w, int src_h, int pct)
Merge one part of an image with another
int imagecopyresized(int dst_im, int src_im, int dst_x,
int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h)
Copy and resize part of an image
int imagecreate(int x_size, int y_size)
Create a new image
int imagecreatefromgif(string filename)
Create a new image from GIF file or URL
int imagecreatefromjpeg(string filename)
Create a new image from JPEG file or URL
int imagecreatefrompng(string filename)
Create a new image from PNG file or URL
int imagecreatefromwbmp(string filename)
Create a new image from WBMP file or URL
int imagecreatefromxbm(string filename)
Create a new image from XBM file or URL
int imagedashedline(int im, int x1, int y1, int x2, int y2, int col)
Draw a dashed line
int imagedestroy(int im)
Destroy an image
int imagefill(int im, int x, int y, int col)
Flood fill
int imagefilledpolygon(int im, array point, int
num_points, int col)
Draw a filled polygon
int imagefilledrectangle(int im, int x1, int y1, int x2, int y2, int col)
Draw a filled rectangle
int imagefilltoborder(int im, int x, int y, int border, int col)
Flood fill to specific color
int imagefontheight(int font)
Get font height
int imagefontwidth(int font)
Get font width
int imagegammacorrect(int im, double inputgamma, double
outputgamma)
Apply a gamma correction to a GD image
int imagegif(int im [, string filename])
Output GIF image to browser or file
int imageinterlace(int im [, int interlace])
Enable or disable interlace
int imagejpeg(int im [, string filename [, int quality]])
Output JPEG image to browser or file
int imageline(int im, int x1, int y1, int x2, int y2, int col)
Draw a line
int imageloadfont(string filename)
Load a new font
int imagepalettecopy(int dst, int src)
Copy the palette from the src image onto the dst image
int imagepng(int im [, string filename])
Output PNG image to browser or file
int imagepolygon(int im, array point, int num_points, int col)
Draw a polygon
array imagepsbbox(string text, int font, int size [, int
space, int tightness, int angle])
Return the bounding box needed by a string if rasterized
bool imagepsencodefont(int font_index, string filename)
To change a fonts character encoding vector
bool imagepsextendfont(int font_index, double extend)
Extend or or condense (if extend < 1) a font
bool imagepsfreefont(int font_index)
Free memory used by a font
int imagepsloadfont(string pathname)
Load a new font from specified file
bool imagepsslantfont(int font_index, double slant)
Slant a font
array imagepstext(int image, string text, int font, int size, int xcoord,
int ycoord [, int space, int tightness, double angle, int antialias])
Rasterize a string over an image
int imagerectangle(int im, int x1, int y1, int x2, int y2, int col)
Draw a rectangle
int imagesetpixel(int im, int x, int y, int col)
Set a single pixel
int imagestring(int im, int font, int x, int y, string str, int col)
Draw a string horizontally
int imagestringup(int im, int font, int x, int y, string str, int col)
Draw a string vertically - rotated 90 degrees counter-clockwise
int imagesx(int im)
Get image width
int imagesy(int im)
Get image height
array imagettfbbox(int size, int angle, string font_file, string text)
Give the bounding box of a text using TrueType fonts
array imagettftext(int im, int size, int angle, int x,
int y, int col, string font_file, string text)
Write text to the image using a TrueType font
int imagetypes(void)
Return the types of images supported in a bitfield - 1=gif, 2=jpeg, 4=png,
8=wbmp
int imagewbmp(int im [, string filename])
Output WBMP image to browser or file
Anyone who wishes to make additions or changes to this
PHP Tip email them to webmaster@linuxguruz.org
This document is Copyright (c) 1999, 2000 by LinuxGuruz
Creating images with GD and PHP
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