What are the best practices for handling text length validation and error handling when generating text on an image in PHP?

When generating text on an image in PHP, it is important to validate the length of the text to ensure it fits within the boundaries of the image. To handle text length validation and error handling, you can utilize functions like `strlen()` to check the length of the text and display an error message if it exceeds the limit. Additionally, you can use try-catch blocks to catch any exceptions that may arise during the text generation process. 

// Define the maximum length of text allowed on the image
$max_text_length = 20;

// Get the text to be displayed on the image
$text = "Lorem ipsum dolor sit amet";

// Validate the length of the text
if(strlen($text) > $max_text_length) {
    echo "Error: Text length exceeds the limit of $max_text_length characters.";
} else {
    // Generate the image with the text
    $image = imagecreate(200, 100);
    $text_color = imagecolorallocate($image, 255, 255, 255);
    imagestring($image, 5, 50, 50, $text, $text_color);
    
    // Output the image
    header('Content-type: image/png');
    imagepng($image);
    imagedestroy($image);
}

Keywords

image generation text length validation error handling PHP functions libraries

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