PHP | Imagick hasPreviousImage() Function

The Imagick::hasPreviousImage() function is an inbuilt function in PHP which is used to check whether the Imagick object is having a previous image or not. If Imagick object has multiple images it returns true else it returns false.

Syntax:

bool Imagick::hasPreviousImage( void )

Parameters: This function does not accepts any parameters.



Return Value: This function returns TRUE if the object has more images when traversing the list in the reverse direction, otherwise returns FALSE.

Below program illustrates the Imagick::hasPreviousImage() function in PHP:

Program: This program demonstrate the working of hasPreviousImage() function with multiple images and without multiple images.

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code

<?php
  
// String array containg path of images
$imagePaths = [
];
  
// Create new Imagick object
$canvas = new Imagick();
  
$image = new Imagick(
  
foreach ($imagePaths as $imagePath) {
      
    // Adding images in the canvas
    $canvas->readImage($imagePath);
}
  
// The pointer points to second image
if($canvas->hasPreviousImage()) {
    echo('$canvas has Multiple Images !!');
}
  
if($image->hasPreviousImage()) {
      
    // With a single image
    echo('$image has Multiple Images !!');
}
  
?>

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Output:

$canvas has Multiple Images !!

Reference: https://www.php.net/manual/en/imagick.haspreviousimage.php



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