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圖形處理

圖形處理. PHP 可讀取、產生 Gif 、 Jpg 、 Png 的 圖形，以及其他的圖形操作，不過必須注意以下幾點： 系統上必須安裝 GD Library （可用 phpinfo() 函數檢查） GD 1.5 （含）以下支援 Gif 、 Jpg ， GD 1.6 以上支援 Png 、 Jpg 。 使用前先修改 php.ini 開啟 GD 模組功能 Win32 ： extension=php_gd2.dll 將產生圖形的 PHP 寫成另一個網頁（因為輸出形態不同） 從要使用圖形的網頁超連結到產生圖形的網頁. 圖形處理－產生圖形. 產生圖形的網頁程序如下： <?

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圖形處理

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  1. 圖形處理 • PHP可讀取、產生Gif、Jpg、Png的 圖形，以及其他的圖形操作，不過必須注意以下幾點： • 系統上必須安裝GD Library （可用phpinfo()函數檢查） • GD 1.5（含）以下支援Gif、Jpg，GD 1.6以上支援Png、Jpg。 • 使用前先修改php.ini開啟GD模組功能 • Win32：extension=php_gd2.dll • 將產生圖形的PHP寫成另一個網頁（因為輸出形態不同） • 從要使用圖形的網頁超連結到產生圖形的網頁

  2. 圖形處理－產生圖形 產生圖形的網頁程序如下： <? //image.php //定義輸出形態 Header("content-type: image/jpeg"); //定義圖形 $im=ImageCreate(100,100); //設定顏色 $black=ImageColorAllocate($im,0,0,0); $white=ImageColorAllocate($im,255,255,255); //其他敘述 ImageArc($im,50,50,98,70,0,360,$white); //製成JPG Imagejpeg($im); //釋放記憶體 ImageDestory($im); ?>

  3. 圖形處理－產生圖形 <?php /* Header( "Content-type: image/jpeg"); */ Header( "Content-type: image/gif"); /* create image */ $image = imagecreate(200,200); /* create color R=100, G=0, R=0 */ $maroon = ImageColorAllocate($image,100,0,0); /* create color R=255, G=255, R=255 */ $white = ImageColorAllocate($image,255,255,255); /* create color green */ $green = ImageColorAllocate($image,0,100,0); /* create white background*/ ImageFilledRectangle($image,0,0,200,200,$white); /* create frame*/ ImageRectangle($image,10,10,190,190,$maroon); /* create inner rectangle*/ ImageFilledRectangle($image,50,70,150,150,$maroon); /* display 5 fonts */ for ($i=1; $i <= 5; $i++) ImageString($image,$i,15,$i*10,'php.weblogs.com',$green); /* render image */ ImageJPEG($image); //ImageGIF($image); /*cleanup memory */ ImageDestroy($image); ?>

  4. 圖形處理－參數呼叫顯示 Chart.htm <img src="chart.php?color=00ff00&width=15&height=10"> Chart.php <? $corder=@$HTTP_GET_VARS['color']; $width=@$HTTP_GET_VARS['width']; $height=@$HTTP_GET_VARS['height']; if ($corder=='') {$corder='000000';} if ($width=='') {$width=20;} if ($height=='') {$height=20;} if ($width<=0) {$width=1;} if ($height<=0) {$height=1;} $im=imagecreate($width,$height); $back_color=$corder; $black=imagecolorallocate($im,hexdec(substr($back_color,0,2)),hexdec(substr($back_color,2,2)),hexdec(substr($back_color,4,2))); imagefill ($im,0,0,$black); imagepng($im); imagedestory($im); ?>

  5. 圖形處理－Resize圖形 gd_cut.php <? header("Content-type: image/jpeg"); $newWidth = 35; $newHeight = 35; $newImg = ImageCreate($newWidth,$newHeight); $origImg = ImageCreateFromjpeg("car1.jpg"); ImageCopyResized($newImg,$origImg,0,0,0,0,$newWidth,$newHeight,ImageSX($origImg),ImageSY($origImg)); Imagejpeg($newImg); ImageDestroy($newImg); ?>

  6. 圖形處理－Pie Chart

  7. 圖形處理－Pie Chart Index.php Piechart.php

  8. 圖形處理－條碼圖形 Barcode.php

  9. <?php function UPCAbarcode($code) { $lw = 2; $hi = 100; $Lencode = array('0001101','0011001','0010011','0111101','0100011', '0110001','0101111','0111011','0110111','0001011'); $Rencode = array('1110010','1100110','1101100','1000010','1011100', '1001110','1010000','1000100','1001000','1110100'); $ends = '101'; $center = '01010'; /* UPC-A Must be 11 digits, we compute the checksum. */ if ( strlen($code) != 11 ) { die("UPC-A Must be 11 digits."); } /* Compute the EAN-13 Checksum digit */ $ncode = '0'.$code; $even = 0; $odd = 0; for ($x=0;$x<12;$x++) { if ($x % 2) { $odd += $ncode[$x]; } else { $even += $ncode[$x]; } } $code.=(10 - (($odd * 3 + $even) % 10)) % 10; /* Create the bar encoding using a binary string */ $bars=$ends; $bars.=$Lencode[$code[0]]; for($x=1;$x<6;$x++) { $bars.=$Lencode[$code[$x]]; } $bars.=$center; for($x=6;$x<12;$x++) { $bars.=$Rencode[$code[$x]]; } $bars.=$ends; /* Generate the Barcode Image */ $img = ImageCreate($lw*95+30,$hi+30); $fg = ImageColorAllocate($img, 0, 0, 0); $bg = ImageColorAllocate($img, 255, 255, 255); ImageFilledRectangle($img, 0, 0, $lw*95+30, $hi+30, $bg); $shift=10; for ($x=0;$x<strlen($bars);$x++) { if (($x<10) || ($x>=45 && $x<50) || ($x >=85)) { $sh=10; } else { $sh=0; } if ($bars[$x] == '1') { $color = $fg; } else { $color = $bg; } ImageFilledRectangle($img, ($x*$lw)+15,5,($x+1)*$lw+14,$hi+5+$sh,$color); } /* Add the Human Readable Label */ ImageString($img,4,5,$hi-5,$code[0],$fg); for ($x=0;$x<5;$x++) { ImageString($img,5,$lw*(13+$x*6)+15,$hi+5,$code[$x+1],$fg); ImageString($img,5,$lw*(53+$x*6)+15,$hi+5,$code[$x+6],$fg); } ImageString($img,4,$lw*95+17,$hi-5,$code[11],$fg); /* Output the Header and Content. */ header("Content-Type: image/png"); ImagePNG($img); } UPCAbarcode('12345678901'); ?> 圖形處理－條碼圖形

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