PHP image synthesis technology

PHP Image synthesis technology

Use scenarios ： Product poster and user QR code synthesis
Don't talk much, just go to the code

 There is a kind of thinking in this method , It is subject to opening a picture and adding pictures and text to a picture , File stream from low to high 

/** * @param $data  The text content contained in the QR code  * @param $filename  Save the file name of QR code output ,*.png * @param bool $picPath  The path of QR code output  * @param bool $logo  Included in the QR code LOGO Picture path  * @param string $bgColor  QR code background color  * @param string $color  QR code point color  * @param int $size  The size of the QR code  * @param string $level  QR code error correction level ：L、M、Q、H * @param int $padding  The spacing of the QR code frame  * @param bool $saveandprint  Whether to save to a file and output directly in the browser ,true: Save and export at the same time ,false: Save only files  * @return string */
function myqrcode($data, $filename, $picPath = false, $logo = false, $bgColor='#ffffff', $color='#000000', $size = 15, $level = 'L', $padding = 2, $saveandprint = true) {
    
    vendor("phpqrcode.phpqrcode"); // Introduce the toolkit 
    //  The following notes the code to save the QR code image to the local , If you want to save the picture , use $fileName Replace the second parameter false
    $qrcode = new \QRcode();
    $path = $picPath ? $picPath : "./uploads/".date('Ymd'); // Picture output path 
    if (!file_exists($path)) {
    
        mkdir($path,0777,true);
    }
    $logo = !empty($logo) && file_exists($logo) ? $logo : false;
    // Add LOGO
    if (empty($logo) || $logo === false) {
     // It doesn't contain LOGO
        if ($filename == false) {
    
            $qrcode->png($data, $filename, $level, $size, $padding, $saveandprint, $bgColor, $color); // Output directly to the browser , Not included LOGO
        } else {
    
            $filename = $path . '/' . $filename; // Synthesis path 
            $qrcode->png($data, $filename, $level, $size, $padding, $saveandprint, $bgColor, $color); // Output directly to the browser , Not included LOGO
        }
    } else {
     // contain LOGO
        if ($filename == false) {
    
            //$filename=tempnam('','').'.png';// Generate temporary files 
            die(' Parameter error ');
        } else {
    
            // Generate qr code , Save to file 
            $filename = $path . '/' . $filename; // Synthesis path 
        }
        $qrcode->png($data, $filename, $level, $size, $padding, $saveandprint, $bgColor, $color);
        $QR = imagecreatefromstring(file_get_contents($filename));
        $logo = imagecreatefromstring(file_get_contents($logo));
        $QR_width = imagesx($QR);
        $QR_height = imagesy($QR);
        $logo_width = imagesx($logo);
        $logo_height = imagesy($logo);
        $logo_qr_width = $QR_width / 5;
        $scale = $logo_width / $logo_qr_width;
        $logo_qr_height = $logo_height / $scale;
        $from_width = ($QR_width - $logo_qr_width) / 2;
        imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
        if ($filename === false) {
    
            Header("Content-type: image/png");
            imagepng($QR);
        } else {
    
            if ($saveandprint === true) {
    
                imagepng($QR, $filename);
                //header("Content-type: image/png"); // Output to browser 
                //imagepng($QR);
            } else {
    
                imagepng($QR, $filename);
            }
        }
    }

    return $filename;
}


/** *  Crop the picture into a circular picture  * @param string  The image Url Address  $url * @param string  Saved new url Address  $path */
function circularImg($url, $path){
    
    $w = 270;  $h=270; // original size
    $original_path= $url;
    $src = imagecreatefromstring(file_get_contents($original_path));
    $newpic = imagecreatetruecolor($w,$h);
    imagealphablending($newpic,false);
    $transparent = imagecolorallocatealpha($newpic, 0, 0, 0, 127);
    $r=$w/2;
    for($x=0;$x<$w;$x++)
        for($y=0;$y<$h;$y++){
    
            $c = imagecolorat($src,$x,$y);
            $_x = $x - $w/2;
            $_y = $y - $h/2;
            if((($_x*$_x) + ($_y*$_y)) < ($r*$r)){
    
                imagesetpixel($newpic,$x,$y,$c);
            }else{
    
                imagesetpixel($newpic,$x,$y,$transparent);
            }
        }
    imagesavealpha($newpic, true);
    imagepng($newpic, $path);
    imagedestroy($newpic);
    imagedestroy($src);
    // unlink($url);
    return $path;
}