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PHP | Gmagick getimagecolors() Function

Last Updated : 17 Jan, 2020
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The Gmagick::getimagecolors() function is an inbuilt function in PHP which is used to get the number of unique colors in the image. Syntax:
int Gmagick::getimagecolors( void )
Parameters:This function doesn’t accept any parameter. Return Value: This function returns an integer value. Exceptions: This function throws GmagickException on error. Used Image: To capture the canvas area Below given programs illustrate the Gmagick::getimagecolors() function in PHP: Program 1: For an image with multiple colors. php
<?php

// Create a new Gmagick object
$gmagick = new Gmagick('geeksforgeeks.png');

// Get the border color
$color = $gmagick->getimagecolors();
echo $color;
?>
Output:
2955
Program 2: For an image with single color. php
<?php

// Create a new Gmagick object
$gmagick = new Gmagick('singlecolor.png');

// Get the border color
$color = $gmagick->getimagecolors();
echo $color;
?>
Output:
1
Program 3: For a drawing php
<?php

// Create a new Gmagick object
$gmagick = new Gmagick('geeksforgeeks.png');

// Create a GmagickDraw object
$draw = new GmagickDraw();

// Set the color
$draw->setFillColor('white');

// Function to draw rectangle
$draw->rectangle(0, 0, 800, 400);

// Set the fill color
$draw->setFillColor('red');

// Set the font size
$draw->setfontsize(50);

// Annotate a text
$draw->annotate(30, 100, 'GeeksforGeeks');

// Use of drawimage function
$gmagick->drawImage($draw);

// Get the image colors
$colors = $gmagick->getimagecolors();
echo $colors;
?>
Output:
238
Reference: https://www.php.net/manual/en/gmagick.getimagecolors.php

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