本文实例讲述了PHP动态生成指定大小随机图片的方法。分享给大家供大家参考,具体如下:
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<?php $image_width = 100; $image_height = 100; $image_str = '' ; if (isset( $_GET [ 'w' ])) { $image_width = intval ( $_GET [ 'w' ]); } if (isset( $_GET [ 'h' ])) { $image_height = intval ( $_GET [ 'h' ]); } if (isset( $_GET [ 's' ])) { $image_str = $_GET [ 's' ]; } $img = imagecreate( $image_width , $image_height ); $color = imagecolorallocate( $img , mt_rand(157,255), mt_rand(157,255), mt_rand(157,255)); imagefilledrectangle( $img , 0, $image_height , $image_width , 0, $color ); $step = mt_rand(15, 30); $start = mt_rand(0, $step ); $color = imagecolorallocate( $img , mt_rand(200,255), mt_rand(200,255), mt_rand(200,255)); imagesetthickness( $img , mt_rand(3, 10)); if ( $image_height > $image_width ) { for ( $i = $start ; $i < $image_height * 2; $i += $step ) { imageline( $img , 0, $i , $i , 0, $color ); } } else { for ( $i = $start ; $i < $image_width * 2; $i += $step ) { imageline( $img , $i , 0, 0, $i , $color ); } } if ( $image_str != '' ) { $black = imagecolorallocate( $img , 0, 0, 0); imagestring( $img , 12, 5, 5, $image_str , $black ); } header( 'Content-type:image/png' ); imagepng( $img ); imagedestroy( $img ); |
希望本文所述对大家PHP程序设计有所帮助。