PHP get text display dot matrix width and height method

This article mainly introduces PHP to obtain a text display lattice width and height of the method, involving the use of Imagettfbbox function and PHP operation TTF text skills, with a certain reference value, the need for friends can refer to the next

The example in this paper describes how PHP obtains a piece of text to display the lattice width and height. Specific as follows:

Define ("F_size", 8);d efine ("F_font", "Arial.ttf"), function Get_bbox ($text) {  return Imagettfbbox (f_size, 0, F_ FONT, $text);} function Text_height ($text) {  $box = Get_bbox ($text);  $height = $box [3]-$box [5];  return $height;} function Text_width ($text) {  $box = Get_bbox ($text);  $width = $box [4]-$box [6];  return $width;}

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