What are the limitations of simply restricting the number of characters in a string when dealing with non-proportional fonts in PHP?

When dealing with non-proportional fonts in PHP, simply restricting the number of characters in a string may not accurately control the text length due to varying character widths. To address this issue, you can use functions like `imagettfbbox()` to calculate the actual width of the text in pixels and adjust accordingly. 

$text = "Lorem ipsum dolor sit amet";
$font = "arial.ttf";
$font_size = 12;

// Get the bounding box of the text
$bbox = imagettfbbox($font_size, 0, $font, $text);

// Calculate the width of the text
$text_width = $bbox[2] - $bbox[0];

// Adjust the text length based on the desired width
$max_width = 100;
if ($text_width > $max_width) {
    $ratio = $max_width / $text_width;
    $new_length = strlen($text) * $ratio;
    $text = substr($text, 0, $new_length);
}

echo $text;

Keywords

string characters non-proportional fonts limitations PHP

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