What are some common reasons for the "Call to undefined function: pdf_open()" error in PHP?

The "Call to undefined function: pdf_open()" error in PHP typically occurs when the PDF functions are not enabled in the PHP configuration or the PDF extension is not installed. To solve this issue, you need to make sure that the PDF extension is installed and enabled in your PHP configuration. 

// Check if the PDF extension is enabled
if (!extension_loaded('pdf')) {
    echo 'PDF extension is not enabled. Please enable it in your PHP configuration.';
    exit;
}

// Your code that uses the PDF functions here

Keywords

Call undefined function pdf_open() error PHP

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