Set a single pixel

imagesetinterpolation
imagesetstyle
GD and Image Functions
PHP Manual

# imagesetpixel

(PHP 4, PHP 5, PHP 7)

imagesetpixel — Set a single pixel

### Description

bool imagesetpixel ( resource `$image` , int `$x` , int `$y` , int `$color` )

imagesetpixel() draws a pixel at the specified coordinate.

### Parameters

`image`

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

`x`

  x-coordinate.

`y`

  y-coordinate.

`color`

  A color identifier created with imagecolorallocate().

### Return Values

Returns `TRUE` on success or `FALSE` on failure.

### Examples

Example #1 imagesetpixel() example

A random drawing that ends with a regular picture.

`<?php
$x = 200;
$y = 200;
$gd = imagecreatetruecolor($x, $y);
$corners[0] = array('x' => 100, 'y' => 10);
$corners[1] = array('x' => 0, 'y' => 190);
$corners[2] = array('x' => 200, 'y' => 190);
$red = imagecolorallocate($gd, 255, 0, 0);
for ($i = 0; $i < 100000; $i++) {
imagesetpixel($gd, round($x),round($y), $red);
$a = rand(0, 2);
$x = ($x + $corners[$a]['x']) / 2;
$y = ($y + $corners[$a]['y']) / 2;
}
header('Content-Type: image/png');
imagepng($gd);
?>`

The above example will output something similar to:

### See Also

- imagecreatetruecolor() - Create a new true color image
- imagecolorallocate() - Allocate a color for an image
- imagecolorat() - Get the index of the color of a pixel

imagesetinterpolation
imagesetstyle
GD and Image Functions
PHP Manual