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本文實例講述了php基于GD庫畫五星紅旗的方法。分享給大家供大家參考。具體分析如下：

這里實例分析php畫的五星紅旗（GD庫），代碼如下：

復制代碼代碼如下:

	<?php

	header("Content-Type:image/jpeg");

	$ing = imagecreatetruecolor(700,410);

	//新建一個真彩色圖像，返回值為一個圖像標識符，背景默認為黑色，參數(x_size*y_size)

	$red = imagecolorallocate($ing,255,0,0);//定義背景顏色

	$yellow = imagecolorallocate($ing,237,231,32);//定義黃色

	imagefill($ing,0,0,$red);//填充顏色，以坐標(0,0)開始起填充

	//數組坐標，表示(x1,y1,x2,y2,x3,y3.....x11,y11);

	$a = array(90,30,108,73,157,73,119,102,135,152,93,123,52,152,66,102,29,74,76,73,90,30);

	imagefilledpolygon($ing,$a,10,$yellow);//畫一個多邊形：10表示頂點總數，$yellow表示填充色

	$a1 = array(229,25,229,43,248,48,229,55,229,74,217,60,198,66,210,50,197,34,218,39,229,25);

	imagefilledpolygon($ing,$a1,10,$yellow);

	$a2 = array(227,108,227,127,245,134,228,139,227,157,215,143,196,149,208,132,196,117,215,122,227,108);

	imagefilledpolygon($ing,$a2,10,$yellow);

	$a3 = array(163,184,163,204,181,211,163,216,163,234,152,220,132,225,144,209,132,193,151,199,163,184);

	imagefilledpolygon($ing,$a3,10,$yellow);

	$a4 = array(65,209,65,228,84,235,65,240,65,259,54,245,33,249,46,233,34,217,53,224,68,209);

	imagefilledpolygon($ing,$a4,10,$yellow);

	ob_clean();

	imagejpeg($ing);

	imagedestroy($ing);

	?>