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PHP imagepalettecopy()用法及代碼示例

imagepalettecopy()函數是PHP中的內置函數,用於將調色板從一個圖像複製到另一個圖像。

用法:

void imagepalettecopy( resource $destination, resource $source )

參數:該函數接受上述和以下描述的兩個參數:


  • $destination:它指定目標圖像資源。
  • $source:它指定源圖像資源。

返回值:此函數不返回任何內容。

下麵給出的程序說明了PHP中的imagepalettecopy()函數:

程序1:

<?php 
// Create two palette images 
$palette1 = imagecreate(700, 200); 
$palette2 = imagecreate(700, 200); 
  
// Create a green color 
$green = imagecolorallocate($palette1, 0, 255, 0); 
  
// Add green color as background to pallete 1 
imagefilledrectangle($palette1, 0, 0, 99, 99, $green); 
  
// Copy the palette from image 1 to image 2 
imagepalettecopy($palette2, $palette1); 
  
// Output image to the browser and see the color is green 
header('Content-type:image/png'); 
imagepng($palette2); 
?>

輸出:

程序2:

<?php 
// Create two palette images 
$palette1 = imagecreate(700, 200); 
$palette2 = imagecreate(700, 200); 
  
// Create a green color 
$green = imagecolorallocate($palette1, 0, 255, 0); 
  
// Add green color as background to pallete 1 
imagefilledrectangle($palette1, 0, 0, 99, 99, $green); 
  
// Copy the palette from image 1 to image 2 
imagepalettecopy($palette2, $palette1); 
  
// Get the number of colors in image 
$color1 = imagecolorstotal($palette1); 
$color2 = imagecolorstotal($palette2); 
  
echo "Number of colors at image 1 is " . $color1 . "<br>"; 
echo "Number of colors at image 2 is " . $color2; 
?>

輸出:

Number of colors at image 1 is 1
Number of colors at image 2 is 1

參考: https://www.php.net/manual/en/function.imagepalettecopy.php



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注:本文由純淨天空篩選整理自gurrrung大神的英文原創作品 PHP | imagepalettecopy() function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。