Php: easy watermark and thumbnail graphics

This is a convenient watermark and thumbnail class, which simplifies some operations and writes parameters according to some CSS habits. The code is as follows:

/*
* @ Author sleepless 27262681@qq.com
* Copyright http://www.gowake.cn
*/

Class img {
Function _ construct ($ arg = null ){
$ Args = func_get_args ();
If ($ arg = null ){
Return null;
}
$ This-> im = call_user_func_array (array ($ this, 'create'), $ args );
}

Function _ call ($ func, $ arg ){
If (function_exists ('image'. $ func )){
$ Funcstr = 'image'. $ func;
} Elseif (function_exists ($ func )){
$ Funcstr = $ func;
} Else {
Error ("This class method or function is not available ");
}
Return call_user_func_array ($ funcstr, $ arg );
}

/*
* Create an image
* @ Param string/int path or width of the image file
* @ Param int height, which can be omitted
* @ Param string 6-digit hexadecimal integer
*/
Function create ($ arg = null ){
$ Args = func_get_args ();
If (is_file ($ args [0]) {
$ This-> file = $ args [0];
$ Size = getimagesize ($ this-> file) or error ('image type error ');
$ This-> size = $ this-> size? $ This-> size: $ size;
$ Type = image_type_to_extension ($ size [2], false );
$ This-> type = $ this-> type? $ This-> type: $ type;
$ Createfunc = 'imagecreatefrom '. $ type;
$ Im = $ createfunc ($ this-> file );
} Elseif (int) $ args [0]> 0 and (int) $ args [1]> 0 ){
$ Im = imagecreatetruecolor (int) $ args [0], (int) $ args [1]) or error ("Sorry, Parameter error! ");
If (! $ Args [2]) {
$ Color = hexdec ('7fffffff ');
Imagecolortransparent ($ im, $ color );
} Else {
$ Color = hexdec (str_replace ('#', '', $ args [2]);
}
$ This-> size = $ this-> size? $ This-> size: array (int) $ args [0], (int) $ args [1]);
Imagefill ($ im, 1, 1, $ color );
} Else {
Error ("Sorry, Parameter error! ");
}
// Imagealphablending ($ im, false); // These two rows are used to record transparent channels.
Imagesavealpha ($ im, true );
Imageinterlace ($ im, true); // enable interlace scan
Return $ im;
}

/*
* Generating thumbnails
* @ Param int $ w width of the new image
* @ Param int $ h width of the new image
* @ Param string/bool $ color (optional) specifies the background color of the new image. if it is false or empty, it is transparent.
* @ Param bool $ lashen (optional) whether to stretch. no stretch is performed by default.
*/
Function suolue ($ w = null, $ h = null, $ color = false, $ lashen = false ){
$ W_o = imagesx ($ this-> im );
$ H_o = imagesy ($ this-> im );
If ($ w = null and $ h! = Null ){
$ W = $ h * $ w_o/$ h_o;
} Elseif ($ w! = Null and $ h = null ){
$ H = $ w * $ h_o/$ w_o;
}
$ This-> size = null;
$ Im = $ this-> create ($ w, $ h, $ color );
$ W_n = $ w;
$ H_n = $ h;
If ($ w_o/$ h_o> $ w/$ h ){
$ H_n = $ w * $ h_o/$ w_o;
$ Y = ($ h-$ h_n)/2;
} Elseif ($ w_o/$ h_o <$ w/$ h ){
$ W_n = $ h * $ w_o/$ h_o;
$ X = ($ w-$ w_n)/2;
}
If ($ lashen ){
$ W_n = $ w;
$ H_n = $ h;
$ X = 0;
$ Y = 0;
}
Imagecopyresampled ($ im, $ this-> im, $ x, $ y, 0, $ w_n, $ h_n, $ w_o, $ h_o );
// Imagedestroy ($ this-> im );
$ This-> im = $ im;
Return $ im;
}

/*
* Write on an image
* @ Param string $ str string to be written
* @ Param array $ parameters related to arg string, which is an associated array. left is the left distance, right is the right distance, left is the first, and top is the top distance, bottom is the bottom distance, top priority; angle is the angle, color is the 6-digit hexadecimal color, touming is the text transparency, font is the font file
*/
Function write ($ str = '', $ arg = array ()){
$ Size = $ arg ['size']? $ Arg ['size']: 20;
$ Angle = $ arg ['ange']? $ Arg ['ange']: 0;
$ Color = $ arg ['color']? $ Arg ['color']: '20140901 ';
$ Touming = $ arg ['touming']? $ Arg ['touming']: 100;
$ Touming = dechex (100-$ touming) * 127/100 );
$ Color = hexdec ($ touming. str_replace ("#", "", $ color ));
$ Font = $ arg ['font']? $ Arg ['font']: 'Arial. ttf ';
$ Boxarr = imagettfbbox ($ size, $ angle, $ font, $ str );
$ W = imagesx ($ this-> im );
$ H = imagesy ($ this-> im );

$ X_l = $ x_r = $ boxarr [0];
$ Y_t = $ y_ B = $ boxarr [1];
For ($ I = 0; $ I <7; $ I = $ I + 2 ){
$ X_l = $ boxarr [$ I] <$ x_l? $ Boxarr [$ I]: $ x_l;
$ X_r = $ boxarr [$ I]> $ x_r? $ Boxarr [$ I]: $ x_r;
$ Y_t = $ boxarr [$ I + 1] <$ y_t? $ Boxarr [$ I + 1]: $ y_t;
$ Y_ B = $ boxarr [$ I + 1]> $ y_ B? $ Boxarr [$ I + 1]: $ y_ B;
}
$ Width = $ x_r-$ x_l;
$ Height = $ y_ B-$ y_t;

/* Get the exact offset */
$ Im = $ this-> create ($ width * 4, $ height * 4 );
$ Tm = hexdec ('7fffffff ');
Imagettftext ($ im, $ size, $ angle, $ width * 2, $ height * 2, $ color, $ font, $ str );
For ($ I = 0; $ I <$ width * 4; $ I ++ ){
For ($ ii = 0; $ ii <$ height * 4; $ ii ++ ){
If (imagecolorat ($ im, $ I, $ ii )! = $ Tm ){
$ X_l = $ I;
Break (2 );
}
}
}
For ($ I = 0; $ I <$ height * 4; $ I ++ ){
For ($ ii = $ x_l; $ ii <$ width * 4; $ ii ++ ){
If (imagecolorat ($ im, $ ii, $ I )! = $ Tm ){
$ Y_t = $ I;
Break (2 );
}
}
}
For ($ I = $ width * 4-1; $ I> 0; $ I --){
For ($ ii = $ y_t; $ ii <$ height * 4; $ ii ++ ){
If (imagecolorat ($ im, $ I, $ ii )! = $ Tm ){
$ X_r = $ I;
Break (2 );
}
}
}
For ($ I = $ height * 4-1; $ I> 0; $ I --){
For ($ ii = $ x_l; $ ii <= $ x_r; $ ii ++ ){
If (imagecolorat ($ im, $ ii, $ I )! = $ Tm ){
$ Y_ B = $ I;
Break (2 );
}
}
}
$ X_off = $ x_l-$ width * 2;
$ Y_off = $ y_ B-$ height * 2;
$ Width = $ x_r-$ x_l; // exact width
$ Height = $ y_ B-$ y_t; // precise height
Imagedestroy ($ im );

If (isset ($ arg ['left']) {
$ X = (int) $ arg ['left']-$ x_off;
} Elseif (isset ($ arg ['right']) {
$ X = $ w-(int) $ arg ['right']-$ width-$ x_off;
} Else {
$ X = ($ w-$ width)/2-$ x_off;
}
If (isset ($ arg ['top']) {
$ Y = (int) $ arg ['top']-$ y_off + $ height;
} Elseif (isset ($ arg ['bottom ']) {
$ Y = $ h-(int) $ arg ['bottom ']-$ y_off;
} Else {
$ Y = ($ h + $ height)/2-$ y_off;
}

Imagettftext ($ this-> im, $ size, $ angle, $ x, $ y, $ color, $ font, $ str );
Return $ this-> im;
}

/*
* Merge images (water Shadows)
* @ Param string/resource $ file path of the image file or the image identifier
* @ Param array $ parameters related to arg string, which is an associated array. left is the left distance, right is the right distance, left is the first, and top is the top distance, bottom is the distance from the bottom, top priority; touming is the text transparency
*/
Function merge ($ file, $ arg = array ()){
If (is_file ($ file )){
$ Imc = $ this-> create ($ file );
} Elseif (gettype ($ file) = 'resource '){
$ Imc = $ file;
} Else {
Error ("No image ");
}
$ Touming = $ arg ['touming']? (Int) $ arg ['touming']: 100;
$ W = imagesx ($ this-> im );
$ H = imagesy ($ this-> im );
$ Width = imagesx ($ imc );
$ Height = imagesy ($ imc );
If (isset ($ arg ['left']) {
$ X = (int) $ arg ['left'];
} Elseif (isset ($ arg ['right']) {
$ X = $ w-(int) $ arg ['right']-$ width;
} Else {
$ X = ($ w-$ width)/2;
}
If (isset ($ arg ['top']) {
$ Y = (int) $ arg ['top'];
} Elseif (isset ($ arg ['bottom ']) {
$ Y = $ h-$ height-$ arg ['bottom '];
} Else {
$ Y = ($ h-$ height)/2;
}
Imagecopymergegray ($ this-> im, $ imc, $ x, $ y, 0, $ width, $ height, $ touming );
}

/*
* Output image
* @ Param string $ type
* @ Param string $ path of the file to be stored in filename
* @ Param int $ zhiliang jpeg image exclusive, image definition
*/
Function display ($ type = null, $ filename = null, $ zhiliang = null ){
If ($ type = null ){
$ Type = $ this-> type? $ This-> type: 'jpg ';
}
If ($ type = 'jpeg 'or $ type = 'jpg') and $ zhiliang = null ){
$ Type = 'jpeg ';
$ Zhiliang = 100;
}
If ($ filename = null ){
Header ('content-type: image/'. $ type );
}
$ Displayfunc = 'image'. $ type;
$ Displayfunc ($ this-> im, $ filename, $ zhiliang );
Imagedestroy ($ this-> im );
}

Function randcolor ($ a, $ B ){
$ A = $ a> 255? 255: (int) $;
$ A = $ a <0? 0: (int) $;
$ B = $ B> 255? 255: (int) $ B;
$ B = $ B <0? 0: (int) $ B;
For ($ I = 0; $ I <3; $ I ++ ){
$ Color. = str_pad (dechex (mt_rand ($ a, $ B), 2, "0", STR_PAD_LEFT );
}
Return $ color;
}
}

/*
Function error ($ msg, $ debug = false ){
$ Err = new Exception ($ msg );
$ Str ="

\ N error: \ n ". print_r ($ err-> getTrace (), 1)." \ n

";
If ($ debug = true ){
File_put_contents (date ('Y-m-D'). ". log", $ str );
Return $ str;
} Else {
Die ($ str );
}
}
*/
?>

This is a simple usage example.
The code is as follows:
$ Img = new img('a.png ');
$ M = $ img-> im;
$ Im = $ img-> suolue (100 );
$ Img-> im = $ m;
$ Img-> suolue (300 );
$ Img-> merge ($ m, array ('left' => 0, 'top' => 0, 'touming' => 60 ));
$ Img-> merge ($ im, array ('right' => 0, 'top' => 0, 'touming' => 60 ));
$ Img-> merge ($ im, array ('left' => 0, 'bottom '=> 0, 'touming' => 60 ));
$ Img-> merge ($ im, array ('right' => 0, 'bottom '=> 0, 'touming' => 60 ));

$ Img-> write ("Spring is Coming", array ('left' => 0, 'top' => 0, 'size' => 30, 'color' => $ img-> randcolor (0,180), 'angle '=>-45, 'font' => 'simfang. ttf', 'touming' => 80 ));
$ Img-> write ("Spring is Coming", array ('left' => 0, 'bottom '=> 0, 'size' => 30, 'color' => $ img-> randcolor (0,180), 'angle '=> 45, 'font' => 'simfang. ttf', 'touming' => 80 ));
$ Img-> write ("Spring is Coming", array ('right' => 0, 'bottom '=> 0, 'size' => 30, 'color' => $ img-> randcolor (0,180), 'angle '=>-45, 'font' => 'simfang. ttf', 'touming' => 80 ));
$ Img-> write ("Spring is Coming", array ('right' => 0, 'top' => 0, 'size' => 30, 'color' => $ img-> randcolor (0,180), 'angle '=> 45, 'font' => 'simfang. ttf', 'touming' => 80 ));
$ Img-> display ("gif ");