How to automatically wrap text and images in imagettfbbox and imagettftext in PHP

This article mainly introduces the method of automatic line wrapping of text and pictures in imagettfbbox and imagettftext in PHP. It has a certain reference value. Now I share it with you. Friends in need can refer to it.

mb_internal_encoding("UTF-8"); // 设置编码
   // 这几个变量分别是 字体大小, 角度, 字体名称, 字符串, 预设宽度
   $content = "";
// 将字符串拆分成一个个单字 保存到数组 letter 中
   for ($i=0;$i<mb_strlen($text3);$i++) {
       $letter[] = mb_substr($text3, $i, 1);
   }
foreach ($letter as $l) {
       $teststr = $content." ".$l;
       $fontBox = imagettfbbox($fontSize, 0, $font, $teststr);
//        $testbox = imagettfbbox($fontsize, $angle, $fontface, $teststr);
       // 判断拼接后的字符串是否超过预设的宽度
       if (($fontBox[2] > $width) && ($content !== "")) {
           $content .= "\n";
       }
       $content .= $l;
   }

//    $fontBox = imagettfbbox($fontSize, 0, $font, $text3);
   imagettftext ( $target, $fontSize, 0, ceil(($width - $fontBox[2]) / 2), 400, $fontColor_black, $font, $content );

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