Laravel How to write verification code file, and prevent Chinese garbled.

This example generates a Chinese verification code, which is designed for Laravel.

Controller: Public Function Getvcode (Request $request) {$width = 845;        $height = 125; $fp =fopen (the URL ('/'). '        /front/register/chengyu.txt ', ' r ');//open local file with 150 idioms stored in it! One line.        $hang =rand (0,149); for ($i = 0;;            $i + +) {$get =fgets ($fp);        if ($i = = $hang) break;        } $text = $get;//Get the Idiom string header (' Content-type:image/jpeg ');        1. Create Canvas $img = Imagecreatetruecolor ($width, $height);        1-1. Background color random 0~125 dark 126~255 Light $bgColor = Imagecolorallocate ($img, Rand (126,255), Rand (126,255), Rand (126,255));        Imagefill ($img, 0,0, $bgColor); 2, write or draw//2-1, draw point for ($i = 0; $i <= ($height * $width/15); $i + +) {$pixX = rand (5, $width-5); The position of the random x $pixY = rand (5, $height-5);//The position of the random y $pixColor = imagecolorallocate ($img, Rand (0,125), rand (0,1            ), Rand (0,125));        Imagesetpixel ($img, $pixX, $pixY, $pixColor); }//2-2, write $code = ' AbcdefghijklmnoPqrstuvwxyz ';        $len = Mb_strlen ($text, ' UTF-8 ');            for ($j = 1; $j <= 4; $j + +) {//font size randomly from 15 pixels to pixels $fontSize = rand (($height/2-5), ($height/2+10)); The position of x $fontX = ($width/4) * ($J-1);//25//y Position $fontY = $height *0.            75;            Font Color $fontColor = Imagecolorallocate ($img, Rand (0,125), Rand (0,125), Rand (0,125));            Each random word $fontText = Mb_substr ($text, $j -1,1, ' UTF-8 ');//Read a Chinese character//echo $fontText; Imagettftext ($img, $fontSize, 0, $fontX, $fontY, $fontColor, $_server[' Document_root '). ' /front/register/fzstk.        TTF ', $fontText);        }//3, Output or save imagejpeg ($img); 4, Analytic template view (' Front.register.showvcode ', [' dd ' = imagejpeg ($img)]);
5 Destruction of resources
Image_destroy ($IMG); }

Address one of the following issues:

1 laravel Routing and template files are self-designed.

2 fopen Open the file under the public directory:

$fp =fopen (the URL ('/'). ' /front/register/chengyu.txt ', ' R ');

3 intercepting Chinese characters, UTF8 format, using mb_substr

Mb_substr ($text, $j -1,1, ' UTF-8 ');

4 TTF file access

$_server[' Document_root ']. ' /front/register/fzstk. TTF '

5 variables brought to the template

[' dd ' = imagejpeg ($img)]

6 file saved as Utf-8 no BOM format , and note whether TTF is going to output English or Chinese !! Don't be mistaken.

Laravel How to write verification code file, and prevent Chinese garbled.