PHP generate image thumbnails _ PHP Tutorial

PHP generates image thumbnails. PHP generates image thumbnails: to use PHP to generate image thumbnails, make sure that your PHP Server has installed the GD2 graphics library and uses a class to generate image thumbnails, see the following section for the class source code to call this PHP to generate image thumbnails:

To use PHP to generate image thumbnails, ensure that the GD2 graphics library is installed on your PHP server.

Use a class to generate image thumbnails. the source code of the class is described below.

Call this method:

Resizeimage = new resizeimage ("Image source file address", "200", "100", "0", "thumbnail address ");

// A thumbnail can be generated with only one sentence above. the source file and the thumbnail address can be the same, and 200,100 represents the width and height respectively.

// Use the following classes to generate image thumbnails,

Class resizeimage

{

// Image type

Var type;

// Actual width

Var width;

// Actual height

Var height;

// Change the width

Var resize_width;

// The height after the change

Var resize_height;

// Whether to cut the image

Var cut;

// Source image

Var srcimg;

// Target Image address

Var dstimg;

// Temporarily created image

Var im;

Function resizeimage (img, wid, hei, c, dstpath)

{

This-> srcimg = img;

This-> resize_width = wid;

This-> resize_height = hei;

This-> cut = c;

// Image type

This-> type = strtolower (substr (strrchr (this-> srcimg, "."), 1 ));

// Initialize the image

This-> initi_img ();

// Target Image address

This-> dst_img (dstpath );

//--

This-> width = imagesx (this-> im );

This-> height = imagesy (this-> im );

// Generate an image

This-> newimg ();

ImageDestroy (this-> im );

}

Function newimg ()

{

// Ratio of the changed image

Resize_ratio = (this-> resize_width)/(this-> resize_height );

// Ratio of the actual image

Ratio = (this-> width)/(this-> height );

If (this-> cut) = "1 ")

// Cut the image

{

If (ratio> = resize_ratio)

// High priority

{

Newimg = imagecreatetruecolor (this-> resize_width, this-> resize_height );

Imagecopyresampled (newimg, this-> im, 0, 0, 0, 0, this-> resize_width, this-> resize_height, (this-> height) * resize_ratio ), this-> height );

ImageJpeg (newimg, this-> dstimg );

}

If (ratio

// The width is preferred.

{

Newimg = imagecreatetruecolor (this-> resize_width, this-> resize_height );

Imagecopyresampled (newimg, this-> im, 0, 0, 0, 0, this-> resize_width, this-> resize_height, this-> width, (this-> width) /resize_ratio ));

ImageJpeg (newimg, this-> dstimg );

}

}

Else

// No cut Chart

{

If (ratio> = resize_ratio)

{

Newimg = imagecreatetruecolor (this-> resize_width, (this-> resize_width)/ratio );

Imagecopyresampled (newimg, this-> im, 0, 0, 0, 0, this-> resize_width, (this-> resize_width)/ratio, this-> width, this-> height );

ImageJpeg (newimg, this-> dstimg );

}

If (ratio

{

Newimg = imagecreatetruecolor (this-> resize_height) * ratio, this-> resize_height );

Imagecopyresampled (newimg, this-> im, 0, 0, 0, 0, (this-> resize_height) * ratio, this-> resize_height, this-> width, this-> height );

ImageJpeg (newimg, this-> dstimg );

}

}

}

// Initialize the image

Function initi_img ()

{

If (this-> type = "jpg ")

{

This-> im = imagecreatefromjpeg (this-> srcimg );

}

If (this-> type = "gif ")

{

This-> im = imagecreatefromgif (this-> srcimg );

}

If (this-> type = "png ")

{

This-> im = imagecreatefrompng (this-> srcimg );

}

}

// Target Image address

Function dst_img (dstpath)

{

Full_length = strlen (this-> srcimg );

Type_length = strlen (this-> type );

Name_length = full_length-type_length;

Name = substr (this-> srcimg, 0, name_length-1 );

This-> dstimg = dstpath;

// Echo this-> dstimg;

}

}

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Ghost needs to use PHP to generate image thumbnails. make sure that the GD2 graphics library is installed on your PHP Server and uses a class to generate image thumbnails. the class source code can be called below...