一、創建圖片資源
imagecreatetruecolor(width,height);
imagecreatefromgif(圖片名稱);
imagecreatefrompng(圖片名稱);
imagecreatefromjpeg(圖片名稱);畫出各種圖像 imagegif(圖片資源,保存路徑);
imagepng()
imagejpeg();
二、獲取圖片屬性
imagesx(res//寬度
imagesy(res//高度
getimagesize(文件路徑)
返回一個具有四個單元的數組。索引 0 包含圖像寬度的像素值，索引 1 包含圖像高度的像素值。索引 2 是圖像類型的標記：1 = GIF，2 = JPG，3 = PNG，4 = SWF，5 = PSD，6 = BMP，7 = TIFF(intel byte order)，8 = TIFF(motorola byte order)，9 = JPC，10 = JP2，11 = JPX，12 = JB2，13 = SWC，14 = IFF，15 = WBMP，16 = XBM。這些標記與 PHP 4.3.0 新加的 IMAGETYPE 常量對應。索引 3 是文本字符串，內容為“height="yyy" width="xxx"”，可直接用於 IMG 標記。
銷毀圖像資源
imagedestroy(圖片資源);
三、透明處理
PNG、jpeg透明色都正常，只有gif不正常
imagecolortransparent(resource image [,int color])//將某個顏色設置成透明色
imagecolorstotal()
imagecolorforindex();
四、圖片的裁剪
imagecopyresized()
imagecopyresampled();
五、加水印（文字、圖片）
字符串編碼轉換string iconv ( string $in_charset , string $out_charset , string $str )
六、圖片旋轉
imagerotate();//制定角度的圖片翻轉
七、圖片的翻轉
沿X軸 沿Y軸翻轉
八、銳化
imagecolorsforindex()
imagecolorat()
在圖片上畫圖形 $img=imagecreatefromgif("./images/map.gif");
<?
= imagecolorallocate(, 255, 0, 0
imageline(, 0, 0, 100, 100, imageellipse(, 200, 100, 100, 100, imagegif(, "./images/map2.gif" imagedestroy( 復制代碼 代碼如下:
="./images/hee.jpg" =0.3 (, )=( =* =* =imagecreatetruecolor(, =imagecreatefromjpeg(
imagecopyresized(, ,0, 0,0, 0,, , ,
imagejpeg(, "./images/hee2.jpg" imagedestroy( imagedestroy(
復制代碼 代碼如下:
thumn(, , , (, )=();
( && ( < = ( / ) * } = ( / ) * =imagecreatetruecolor(, =imagecreatefromjpeg( imagecopyresampled(, , 0, 0, 0, 0, , , , imagejpeg(, imagedestroy( imagedestroy( thumn("images/hee.jpg", 200, 200, "./images/hee3.jpg"
復制代碼 代碼如下:
thumn(, , , (, )=( ( && ( < = ( / ) * } = ( / ) * =imagecreatetruecolor(, =imagecreatefromgif( =imagecolortransparent( ( >=0 && < imagecolorstotal()){
=imagecolorsforindex(, );
=imagecolorallocate(, ["red"], ["green"], ["blue" imagefill(, 0, 0, imagecolortransparent(, imagecopyresized(, , 0, 0, 0, 0, , , , imagegif(, imagedestroy( imagedestroy( thumn("images/map.gif", 200, 200, "./images/map3.gif");
<? cut(, , , , , =imagecreatefromjpeg(=imagecreatetruecolor(, , , 0, 0, , , , ,,, "./images/hee.jpg", 440, 140, 117, 112, "./images/hee5.jpg"?>
文字水印
<?
mark_text(, , , =imagecreatefromjpeg( =imagecolorallocate(, 0, 255, 0 imagettftext(, 20, 0, , , , "simkai.ttf", imagejpeg(, "./images/hee7.jpg" imagedestroy( mark_text("./images/hee.jpg", "細說PHP", 150, 250
mark_pic(, , , =imagecreatefromjpeg( =imagecreatefromgif( =imagesx( =imagesy( imagecopy(, , , , 0, 0, , imagejpeg(,"./images/hee8.jpg" imagedestroy( imagedestroy( mark_pic("./images/hee.jpg", "./images/gaolf.gif", 50, 200);
圖片旋轉
<?
=imagecreatefromjpeg("./images/hee.jpg"
=imagerotate(, 45, 0 imagejpeg(, "./images/hee9.jpg" ?>
<?
turn_y(,
=imagecreatefromjpeg( =imagesx( =imagesy( =imagecreatetruecolor(, (=0; < ; ++ imagecopy(, , --1, 0, , 0, 1, imagejpeg(, imagedestroy( imagedestroy( turn_x(, =imagecreatefromjpeg( =imagesx( =imagesy( =imagecreatetruecolor(, (=0; < ; ++ imagecopy(, ,0, --1, 0, , , 1 imagejpeg(, imagedestroy( imagedestroy( turn_y("./images/hee.jpg", "./images/hee11.jpg" turn_x("./images/hee.jpg", "./images/hee12.jpg" ?>
