What are some common mistakes that can prevent the image from being generated successfully in PHP?

One common mistake that can prevent the image from being generated successfully in PHP is not setting the correct content type header before outputting the image. This can cause the image to be displayed as broken or not displayed at all. To solve this issue, make sure to set the content type header to "image/png" or the appropriate image type before outputting the image data. 

<?php
// Set the content type header
header('Content-Type: image/png');

// Generate and output the image
$image = imagecreate(200, 200);
$bg_color = imagecolorallocate($image, 255, 255, 255);
$text_color = imagecolorallocate($image, 0, 0, 0);
imagestring($image, 5, 50, 50, 'Hello World', $text_color);
imagepng($image);
imagedestroy($image);
?>

Keywords

GD library imagecreatefromjpeg permissions memory_limit file path

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