Two kinds of implementation code _php example of PHP to image watermark

the simplest way to add watermarks to PHP

<?php$img = Imagecreatefromjpeg ($filename); $logo = Imagecreatefromjpeg ($filename);/* imagecraetefromjpeg-A new image is created by a file or URL imagecreatefromjpeg (string $filename) if the fopen wrapper is enabled, the URL can be used as the file name */imagecopy ($img , $logo, 15,15,0,0, $width, $height);/*imagecopy ($dst _im, $src _im, $dst _x, $dst _y, $src _x, $src _y, $src _w, $src _h) $dst _ Im is the background image, is the need to add a watermark image $src_im is a watermark picture; $dst _x, #dst_y需要把水印放到背景图片的 (x, y) coordinates; $src _x, $src _y is the starting coordinate of the image that intercepts the watermark $width,$ Height is the captured picture is the length and width of the watermark */$url = ' http://www.stchat.cn/data/attachment/forum/201506/12/100759pidbdaydh8dy7iby.jpg '; $content = file_get_contents ($url);//write the URL into the content variable/*file_get_contents--read the entire file into a string */$filename = ' Tmp.jpg '; file_put_contents ($filename, $content);//Put everything in the filename variable, the first one to hold the background image/*file_put_contents (string $ Filename,mixed $data) writes a string to a file filename to be written to data the data to be written to, the type can be String,array or stream resource */$url = '; file_put_ Contents (' Logo.png ', file_get_contents ($url));//The second is a picture of the watermark $img = Imagecreatefromjpeg ($filename); $logo = Imagecreatefrompng (' logo.png '); $size = GetImageSize (' Logo.png ');/*getimagesize () Gets the image size */imagecopy ($img, $logo, 15,15,0,0, $size [0], $size [1]); Header ("Centent-type: Image/jpeg "); Imagejpeg (IMG);? >

PHP To add a text watermark to a picture

<?php/* the way to add text watermark to the picture */$dst _path = ' http://f4.topitme.com/4/15/11/1166351597fe111154l.jpg '; $dst = Imagecreatefromstring (file_get_contents ($DST _path));/*imagecreatefromstring ()--Creates a new image from the image stream in the string, returns an image identifier, It expresses the image Image format obtained from a given string will be automatically monitored, as long as PHP supports jpeg,png,gif,wbmp,gd2.*/$font = './t1.ttf '; $black = imagecolorallocate ($dst, 0, 0, 0) Imagefttext ($DST, 0, ten, $black, $font, ' Hello world! '); *imagefttext ($img, $size, $angle, $x, $y, $color, $fontfile, $text) $img the image resource returned by the image creation function size to use the font size of the watermark angle (angle) The tilt angle of the text, If the 0 degree represents the text from left to right, if it is 90 degrees from the beginning of the first text of the x, y watermark text, color is the color of the watermark text fontfile, you want to use the path of the TrueType font */list ($dst _w, $dst _h, $dst _ Type) = GetImageSize ($dst _path);/*list (mixed $varname [, mixed $ ...] --Assigning values in an array to some variables like array (), this is not a real function, but a language structure, and List () assigns a set of variables in one step *//*getimagesize () what information can be obtained?    The GetImageSize function returns all information about the image, including size, type, and so on */switch ($dst _type) {Case 1://gif header ("Content-type:image/gif");    Imagegif ($DST);  Break    Case 2://jpg Header ("Content-type:image/jpeg");    Imagejpeg ($DST);  Break Case 3://png HEader ("Content-type:image/png");    Imagepng ($DST);  Break  Default:break; /*imagepng--output the image in PNG format to a browser or file Imagepng () exports the GD image Stream (image) in PNG format to the callout output (usually a browser), or if filename is given with filename, it is output to a file */} Imagedestroy ($DST);? >

The above is PHP to the image Watermark implementation code, I hope you can master.

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