PHP dynamic effect of adding transparency gradient to a picture _php tutorial

Today because of temporary needs, to dynamic in the image to add the effect of the transparency gradient, on the internet to find a half-day without the corresponding function of the algorithm ....

Wrote one by himself:

The following is the referenced content: $STRIMGSRC = file_get_contents ("http://127.0.0.1/5307754.jpg"); $IMGSRC = imagecreatefromstring ($STRIMGSRC); $IMGSRC = Imagecreatefromjpeg ("5307754.jpg"); $IMGSRCW = Imagesx ($IMGSRC); $imgsrch = Imagesy ($IMGSRC); $width = 30; $x 1 = 2; $x 2 = $IMGSRCW-$x 1-20; $y 1 = ($imgsrch-$width)-2; $y 2 = $y 1 + $width; $steps = $x 2-$x 1; for ($i = 0; $i < $steps; $i + +) { $alphax = Round ($i/($steps/127)) +60; if ($alphax >= 128) $alphax = 127; $alpha = Imagecolorallocatealpha ($imgsrc, 255, 255, 255, $alphax); Imagefilledrectangle ($IMGSRC, ($i + $x 1), $y 1, ($i + $x), $y 2, $alpha); } Header (Content-type:image/jpeg); Imagejpeg ($IMGSRC); Imagedestroy ($IMGSRC); ?>

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