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What are some common errors or bugs that developers may encounter when working with PHP image manipulation functions like imagecreate()?

One common error when working with PHP image manipulation functions like imagecreate() is not checking if the function successfully creates an image resource. This can lead to errors when trying to manipulate the image further. To solve this, always check if imagecreate() returns a valid image resource before proceeding with any image manipulation operations.

php 
$image = imagecreate(200, 200);

if($image === false) {
    die("Error creating image");
}

// Proceed with image manipulation operations

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