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php imagettftext Automatically wrap lines within the specified width_PHP tutorial

WBOYOriginal: 2016-07-13 17:53:271694browse

[php]
function draw_txt_to($card,$pos,$string)
    {

        $font_color = imagecolorallocate($card, $pos['color'][0],$pos['color'][1],$pos['color'][2]);
        $font_file = BASEPATH.'../'.cfg('ttf');
        $_string='';
        $__string='';

        for($i=0;$i         {
            $box=imagettfbbox($pos['fontsize'],0,$font_file,$_string);
            $_string_length=$box[2]-$box[0];
            $box=imagettfbbox($pos['fontsize'],0,$font_file,mb_substr($string,$i,1));

            if( $_string_length+$box[2]-$box[0]<$pos['width'])
            {
                $_string.=mb_substr($string,$i,1);
            }
            else
            {
                $__string.=$_string."n";
                $_string=mb_substr($string,$i,1);
            }
        }
        $__string.=$_string;
        $box=imagettfbbox($pos['fontsize'],0,$font_file,mb_substr($__string,0,1));
        imagettftext(
            $card,
            $pos['fontsize'],
            0,
            $pos['left'],
            $pos['top']+($box[3]-$box[7]),
            $font_color,
            $font_file,
            $__string);


    }

作者：jiaochangyun

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