PHP code for non-deforming screenshots

function My_image_resize ($src _file, $dst _file, $new _width, $new _height) { $src _img=imagecreatefromjpeg ($src _file); $w =imagesx ($src _img); $h =imagesy ($src _img); $ratio _w=1.0 * $new _width/$w; $ratio _h=1.0 * $new _height/$h; $ratio = 1.0; The resulting image of the aspect ratio of the original is small, or all large, the principle is to take a large proportion of magnification, take a large proportion of the reduction (smaller proportion) if (($ratio _w < 1 && $ratio _h < 1) | | ($ratio _w > 1 && $ratio _h > 1)) { if ($ratio _w < $ratio _h) { $ratio = $ratio _h; Case one, the width of the ratio is smaller than the height direction, according to the height of the proportional standard to cut or enlarge }else { $ratio = $ratio _w; } Defines an intermediate temporary image that meets the target's aspect ratio exactly. $inter _w= (int) ($new _width/$ratio); $inter _h= (int) ($new _height/$ratio); $inter _img=imagecreatetruecolor ($inter _w, $inter _h); Imagecopy ($inter _img, $src _img, 0,0,0,0, $inter _w, $inter _h); Generates a temporary image that is the size of the maximum edge length, which is the $ratio scale of the target image To define a new image $new _img=imagecreatetruecolor ($new _width, $new _height); Imagecopyresampled ($new _img, $inter _img,0,0,0,0, $new _width, $new _height, $inter _w, $inter _h); Imagejpeg ($new _img, $dst _file,100); Storing images } End If 1 2 One edge of the target image is larger than the original, one edge is smaller than the original, the flat image is enlarged, then cropped if (($ratio _w < 1 && $ratio _h > 1) | | ($ratio _w >1 && $ratio _h <1)) Else { $ratio = $ratio _h> $ratio _w? $ratio _h: $ratio _w; Take a large proportion of that value Defines an intermediate large image that is equal in height or width of the target image, and then zooms in on the original image $inter _w= (int) ($W * $ratio); $inter _h= (int) ($H * $ratio); $inter _img=imagecreatetruecolor ($inter _w, $inter _h); Crop after scaling the original Imagecopyresampled ($inter _img, $src _img,0,0,0,0, $inter _w, $inter _h, $w, $h); To define a new image $new _img=imagecreatetruecolor ($new _width, $new _height); Imagecopy ($new _img, $inter _img, 0,0,0,0, $new _width, $new _height); } Imagejpeg ($new _img, $dst _file,100); Storing images } $filename = "110.jpg"; The path to the original picture $fileto = "120.jpg";//after the saved path $new the width of the _w=300;//set $new _h=350; Set the high My_image_resize ($filename, $fileto, $new _w, $new _h); ?> Copy Code

No distortion, PHP

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