140 lines
3.9 KiB
PHP
140 lines
3.9 KiB
PHP
<?php
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function compressedImage($srcImgPath, $maxWidth = 0, $maxHeight = 0, $quality)
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{
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// 获取源图片信息
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$srcInfo = getimagesize($srcImgPath);
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if (!$srcInfo) {
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return false;
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}
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// 计算目标尺寸
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$srcWidth = $srcInfo[0];
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$srcHeight = $srcInfo[1];
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if ($maxWidth > 0 && $srcWidth > $maxWidth) {
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$dstWidth = $maxWidth;
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$dstHeight = round($srcHeight * $dstWidth / $srcWidth);
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} else {
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$dstWidth = $srcWidth;
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$dstHeight = $srcHeight;
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}
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if ($maxHeight > 0 && $dstHeight > $maxHeight) {
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$dstHeight = $maxHeight;
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$dstWidth = round($dstHeight * $dstWidth / $dstHeight);
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}
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// 创建目标图像
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$dstImg = imagecreatetruecolor($dstWidth, $dstHeight);
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if (!$dstImg) {
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return false;
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}
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// 读取源图像
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switch ($srcInfo[2]) {
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case IMAGETYPE_JPEG:
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$srcImg = imagecreatefromjpeg($srcImgPath);
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break;
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case IMAGETYPE_PNG:
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$srcImg = imagecreatefrompng($srcImgPath);
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break;
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case IMAGETYPE_GIF:
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$srcImg = imagecreatefromgif($srcImgPath);
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break;
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default:
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return false;
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}
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if (!$srcImg) {
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imagedestroy($dstImg);
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return false;
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}
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// 复制并缩放图像
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if (!imagecopyresampled($dstImg, $srcImg, 0, 0, 0, 0, $dstWidth, $dstHeight, $srcWidth, $srcHeight)) {
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imagedestroy($dstImg);
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imagedestroy($srcImg);
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return false;
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}
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// 输出目标图像
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switch ($srcInfo[2]) {
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case IMAGETYPE_JPEG:
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if (!imagejpeg($dstImg, $srcImgPath, $quality)) {
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imagedestroy($dstImg);
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imagedestroy($srcImg);
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return false;
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}
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break;
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case IMAGETYPE_PNG:
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if (!imagepng($dstImg, $srcImgPath, 9)) {
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imagedestroy($dstImg);
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imagedestroy($srcImg);
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return false;
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}
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break;
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case IMAGETYPE_GIF:
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if (!imagegif($dstImg, $srcImgPath)) {
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imagedestroy($dstImg);
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imagedestroy($srcImg);
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return false;
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}
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break;
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}
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// 释放资源
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imagedestroy($dstImg);
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imagedestroy($srcImg);
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return true;
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}
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function generateRandomString($nums, $type) {
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$characters = array(
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'1' => '0123456789abcdefghijklmnopqrstuvwxyz',
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'2' => '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
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);
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$randomString = '';
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$hasUppercase = false;
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$hasLowercase = false;
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$hasNumber = false;
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for ($j = 0; $j < $nums; $j++) {
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$characterSet = $characters[$type];
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$randomCharacter = $characterSet[rand(0, strlen($characterSet) - 1)];
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$randomString .= $randomCharacter;
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// 检查是否包含大写字母、小写字母和数字
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if (ctype_upper($randomCharacter)) {
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$hasUppercase = true;
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} elseif (ctype_lower($randomCharacter)) {
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$hasLowercase = true;
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} elseif (ctype_digit($randomCharacter)) {
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$hasNumber = true;
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}
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}
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// 如果$type为2且生成的字符串中不包含大写字母、小写字母和数字，则在末尾添加相应字符
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if ($type == 2 && (!$hasUppercase || !$hasLowercase || !$hasNumber)) {
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if (!$hasUppercase) {
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$randomString .= chr(rand(65, 90));
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}
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if (!$hasLowercase) {
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$randomString .= chr(rand(97, 122));
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}
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if (!$hasNumber) {
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$randomString .= rand(0, 9);
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}
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}
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return $randomString;
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}
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function completeHTML($html) {
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$dom = new DOMDocument();
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// 加载HTML字符串，忽略警告
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@$dom->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8'));
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// 获取完整的HTML内容
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$completeHtml = $dom->saveHTML();
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return html_entity_decode($completeHtml, ENT_COMPAT, 'UTF-8');
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} |