生成关键字图片墙

<?php /** * 生成关键字墙图片 * 作者：勇者向前衝 * 日期：2012年8月2日 * 生成速度有点慢，需要10秒，和关键词数量关系不大。 * 仓促写着玩的，有需要的朋友就拿去用吧，如果有更好方法可以告诉我。 * 算法流程： * 定义一些关键词； * 计算每个关键词的字体； * 生成一个原图1/9大小的矩阵，用于存储原图上是否画过的信息，这样搜索的时候能少搜一些； * 初始化图片； * 遍历关键词； * 按找方螺旋顺序从中间搜索； * 如果可以横放或者竖放，就把关键词放入图片，然后在矩阵上标注画过的部分； * 最后把图片输出出来。 * 推荐网站：www.quqiaoqiao.com */ //测试数据，51个关键词 $textArray = array('勇者', '向前衝', '宅', '天使', 'PHP100', '博客', 'PHONE100', 'IT', '资讯', '哈哈', 'PHP', 'CSS', 'Javascript', '可用性', '设计', 'HTML', '产品设计', '交互设计', 'web', '交流会', '表单', 'css3', 'Firefox', '升级拖拉机', '用户体验', '用户研究', 'Canvas', '细节', '插件', '界面设计', 'ControlJS', '兼容', '社会化', 'js', 'iframe', '渲染引擎', '友情提示', '校验', '前端开发', 'Web标准化', 'chrome', 'iphone', '杂谈', 'iPad', 'jQuery', '小鸟微博', '交互', '团队生活', '浏览器', '游记', 'IE6'); // 生成每个关键词的字体大小，最大60，最小10，每一级数量之间相差1，根据关键词数量计算每级减少的大小。 $textWeightArray = array (); $size = 60; $count = 1; $index = 0; $step = ceil ( count ( $textArray ) / 10 ); $sizeStep = ($step < 5) ? 5 : $step; $sizeStep = ($step > 10) ? 10 : $step; foreach ( $textArray as $key => $v ) { if ($size <= 10) { $textWeightArray [$key] = 10; } else { $textWeightArray [$key] = $size; $index ++; if ($index >= $count) { $size -= $sizeStep; $index = 0; $count ++; } } } // 生成原图的1/9的矩阵，用于记录已经画过的地方 $blockMatrix = array (); // 创建一个213*213的方形，里面有个长106，高80的椭圆 for($y = 0; $y < 213; $y ++) { for($x = 0; $x < 213; $x ++) { $xx = ($x - 106) / 106; $yy = ($y - 106) / 80; if ($xx * $xx + $yy * $yy >= 1) { $blockMatrix [$x] [$y] = 1; } else { $blockMatrix [$x] [$y] = 0; } } } // 生成图片，设置颜色和字体 header ( 'Content-Type: image/png' ); $im = imagecreatetruecolor ( 639, 480 ); $black = imagecolorallocate ( $im, 0, 0, 0 ); $white = imagecolorallocate ( $im, 255, 255, 255 ); $red = imagecolorallocate ( $im, 255, 0, 0 ); $green = imagecolorallocate ( $im, 0, 255, 0 ); $blue = imagecolorallocate ( $im, 0, 0, 255 ); $backGroundColor = imagecolorallocate ( $im, 250, 250, 250 ); imagefilledrectangle ( $im, 0, 0, 638, 479, $backGroundColor ); $font = 'MSYHBD.TTF'; // 循环输出文字 foreach ( $textArray as $key => $text ) { $rect = imagettfbbox ( $textWeightArray [$key], 0, $font, $text ); //横着的 $rect2 = imagettfbbox ( $textWeightArray [$key], 90, $font, $text ); //竖着的 $rectSmall = $rect; $rectSmall2 = $rect2; for($i = 0; $i < 8; $i ++) { $rectSmall[$i] /= 3; $rectSmall2[$i] /= 3; } $rectSmall[0] = floor($rectSmall[0]); $rectSmall[1] = ceil($rectSmall[1]); $rectSmall[2] = ceil($rectSmall[2]); $rectSmall[3] = $rectSmall[1]; $rectSmall[4] = $rectSmall[2]; $rectSmall[5] = floor($rectSmall[5]); $rectSmall[6] = $rectSmall[0]; $rectSmall[7] = $rectSmall[5]; $rectSmall2[0] = ceil($rectSmall2[0]); $rectSmall2[1] = ceil($rectSmall2[1]); $rectSmall2[2] = $rectSmall2[0]; $rectSmall2[3] = floor($rectSmall2[3]); $rectSmall2[4] = floor($rectSmall2[4]); $rectSmall2[5] = $rectSmall2[3]; $rectSmall2[6] = $rectSmall2[4]; $rectSmall2[7] = $rectSmall2[1]; // 方螺旋状遍历，四种状态，0向右，1向上，2向左，3向下 $x = 107; $y = 107; $status = 0; $length = 1; $currentLength = 0; while ( $x > 0 && $x < 213 && $y > 0 && $y < 213 ) { $xx = $x * 3 - 1; $yy = $y * 3 - 81; $rs [0] = $rectSmall [0] + $x; $rs [1] = $rectSmall [1] + $y; $rs [2] = $rectSmall [2] + $x; $rs [3] = $rectSmall [3] + $y; $rs [4] = $rectSmall [4] + $x; $rs [5] = $rectSmall [5] + $y; $rs [6] = $rectSmall [6] + $x; $rs [7] = $rectSmall [7] + $y; $rs2 [0] = $rectSmall2 [0] + $x; $rs2 [1] = $rectSmall2 [1] + $y; $rs2 [2] = $rectSmall2 [2] + $x; $rs2 [3] = $rectSmall2 [3] + $y; $rs2 [4] = $rectSmall2 [4] + $x; $rs2 [5] = $rectSmall2 [5] + $y; $rs2 [6] = $rectSmall2 [6] + $x; $rs2 [7] = $rectSmall2 [7] + $y; // 试试横着放或者竖着放 $full = 0; for($j = $rs [7]; $j <= $rs [3]; $j ++) { for($i = $rs [6]; $i <= $rs [4]; $i ++) { if ($i <= 0 || $i >= 213 || $j <= 0 || $j >= 213 || $blockMatrix [$i] [$j] == 1) { $full = 1; break 2; } } } if ($full == 0) { for($j = $rs [7]; $j <= $rs [3]; $j ++) { for($i = $rs [6]; $i <= $rs [4]; $i ++) { $blockMatrix [$i] [$j] = 1; } } $randomColor = imagecolorallocate ( $im, mt_rand ( 5, 250 ), mt_rand ( 5, 250 ), mt_rand ( 5, 250 ) ); imagettftext ( $im, $textWeightArray [$key], 0, $xx, $yy, $randomColor, $font, $text ); break; } else { $full = 0; for($j = $rs2 [3]; $j <= $rs2 [1]; $j ++) { for($i = $rs2 [4]; $i <= $rs2 [2]; $i ++) { if ($i <= 0 || $i >= 213 || $j <= 0 || $j >= 213 || $blockMatrix [$i] [$j] == 1) { $full = 1; break 2; } } } if ($full == 0) { for($j = $rs2 [3]; $j <= $rs2 [1]; $j ++) { for($i = $rs2 [4]; $i <= $rs2 [2]; $i ++) { $blockMatrix [$i] [$j] = 1; } } $randomColor = imagecolorallocate ( $im, mt_rand ( 5, 250 ), mt_rand ( 5, 250 ), mt_rand ( 5, 250 ) ); imagettftext ( $im, $textWeightArray [$key], 90, $xx, $yy, $randomColor, $font, $text ); break; } } if ($status == 0) { $x ++; $currentLength ++; if ($currentLength == $length) { $currentLength = 0; $status = 1; } } else if ($status == 1) { $y --; $currentLength ++; if ($currentLength == $length) { $currentLength = 0; $status = 2; $length ++; } } else if ($status == 2) { $x --; $currentLength ++; if ($currentLength == $length) { $currentLength = 0; $status = 3; } } else if ($status == 3) { $y ++; $currentLength ++; if ($currentLength == $length) { $currentLength = 0; $status = 0; $length ++; } } } } imagepng ( $im ); imagedestroy ( $im ); ?>