What are the potential reasons for the error message "Invalid font filename" when trying to use a font file in PHP?

The error message "Invalid font filename" typically occurs when the font file path provided in the PHP code is incorrect or the font file itself is not valid. To solve this issue, ensure that the font file path is correct and that the font file is properly formatted and accessible by the PHP script. 

// Correct the font file path and ensure it is accessible
$fontFile = 'path/to/font.ttf';

// Check if the font file exists and is readable
if (file_exists($fontFile) && is_readable($fontFile)) {
    // Use the font file in your PHP code
} else {
    echo "Invalid font filename or font file is not accessible.";
}

Keywords

font file PHP error message invalid filename

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