CURL下载文件
/** * @param string $img_url 下载文件地址 * @param string $save_path 下载文件保存目录 * @param string $filename 下载文件保存名称 * @return bool */function curlDownFile($img_url, $save_path = '', $filename = '') { if (trim($img_url) == '') { return false; } if (trim($save_path) == '') { $save_path = './'; } //创建保存目录 if (!file_exists($save_path) && !mkdir($save_path, 0777, true)) { return false; } if (trim($filename) == '') { $img_ext = strrchr($img_url, '.'); $img_exts = array('.gif', '.jpg', '.png'); if (!in_array($img_ext, $img_exts)) { return false; } $filename = time() . $img_ext; } // curl下载文件 $ch = curl_init(); $timeout = 5; curl_setopt($ch, CURLOPT_URL, $img_url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout); $img = curl_exec($ch); curl_close($ch); // 保存文件到制定路径 file_put_contents($filename, $img); unset($img, $url); return true;}// 执行函数之后,会在当前文件的同一目录下生成下载好的图片curlDownFile('http://mimg.127.net/logo/163logo.gif');
CURL上传文件
1.PHP5.5之前使用CURL上传文件
第一种写法,PHP版本要求
$filename 是文件路径,必须有
filename=test.txt 是接收方收到的文件名,为空时 则取 filename 文件路径中的 basename部分
type=text/plain 文档类型,可以为空
/** * @param string $target_url 上传目标地址 * @param string $filename 上传文件路径 * @param string $form_name 表单名称 */function curlUploadFile($target_url, $filename, $form_name) { $post_data = array( $form_name => "@$filename;filename=test.txt;type=text/plain", ); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $target_url); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $result = curl_exec($ch); curl_close($ch);}$target_url = 'http://www.codean.net/notFound/test.php';$filename = realpath("C:/Users/HelloWorld/Desktop/Images/1.jpg");$form_name = 'file';// 接收端使用$_FILES接受curlUploadFile($target_url, $filename, $form_name);
2.PHP5.5之后使用CURL上传文件
第二种写法(推荐),PHP版本 >= 5.5
filename 需要上传的文件,建议使用绝对路径
mimetype: 默认是 application/octet-stream,此处留空
postname: 接收方$_FILES数组中的文件名,默认为文件名
/** * @param string $target_url 上传目标地址 * @param string $filename 上传文件路径 * @param string $form_name 表单名称 */function curlUploadFile($target_url, $filename, $form_name) { $upload_file = new CURLFile($filename); $post_data = array( $form_name => $upload_file ); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $target_url); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $result = curl_exec($ch); curl_close($ch);}$target_url = 'http://www.codean.net/notFound/test.php';$filename = realpath("C:/Users/HelloWorld/Desktop/Images/1.jpg");$form_name = 'file';// 接收端使用$_FILES接受curlUploadFile($target_url, $filename, $form_name);
3.PHP发送文件流上传文件
/* * 第三种写法,使用PHP流发送 * @param string $target_url 上传目标地址 */function curlUploadFile($target_url) { $fh = fopen('php://temp', 'rw+'); $string = 'Hello World'; fwrite($fh, $string); rewind($fh); $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $target_url); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 2); curl_setopt($ch, CURLOPT_PUT, true); curl_setopt($ch, CURLOPT_INFILE, $fh); curl_setopt($ch, CURLOPT_INFILESIZE, strlen($string)); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); $result = curl_exec($ch); curl_close($ch);}$target_url = 'http://www.codean.net/notFound/test.php';curlUploadFile($target_url);// 接收端取出流文件并保存$putdata = fopen('php://input', 'r');$fp = fopen('test.txt', 'w');while ($data = fread($putdata, 1024)) { fwrite($fp, $data);}fclose($fp);fclose($putdata);
4.HTTP报文方式上传文件
/** * @param string $target_url 文件上传地址 */function curlUploadFile($target_url) { // 生成分隔符 $delimiter = '-------------' . uniqid(); // 需要上传的文件数组 $fileFields = array( 'file' => array( 'name' => 'test.png', 'type' => 'text/html', 'content' => 'This is my file content.' ), ); // 后端接受的$_POST的数组值 $postFields = array( 'file' => 'file', ); $data = ''; // 先将post的普通数据生成主体字符串 foreach ($postFields as $name => $content) { $data .= "--" . $delimiter . "\r\n"; $data .= 'Content-Disposition: form-data; name="' . $name . '"'; $data .= "\r\n\r\n" . $content . "\r\n"; } // 将上传的文件生成主体字符串 foreach ($fileFields as $name => $file) { $data .= "--" . $delimiter . "\r\n"; $data .= 'Content-Disposition: form-data; name="' . $name . '"; filename="' . $file['name'] . "\" \r\n"; $data .= 'Content-Type: ' . $file['type'] . "\r\n\r\n"; $data .= $file['content'] . "\r\n"; } // 主体结束的分隔符 $data .= "--" . $delimiter . "--"; // curl上传文件 $handle = curl_init($target_url); curl_setopt($handle, CURLOPT_POST, true); curl_setopt($handle, CURLOPT_HTTPHEADER, array( 'Content-Type: multipart/form-data; boundary=' . $delimiter, 'Content-Length: ' . strlen($data)) ); curl_setopt($handle, CURLOPT_RETURNTRANSFER, 1); curl_setopt($handle, CURLOPT_POSTFIELDS, $data); $result = curl_exec($handle); curl_close($handle);}

DependencyInjection(DI)inPHPenhancescodeflexibilityandtestabilitybydecouplingdependencycreationfromusage.ToimplementDIeffectively:1)UseDIcontainersjudiciouslytoavoidover-engineering.2)Avoidconstructoroverloadbylimitingdependenciestothreeorfour.3)Adhe

ToimproveyourPHPwebsite'sperformance,usethesestrategies:1)ImplementopcodecachingwithOPcachetospeedupscriptinterpretation.2)Optimizedatabasequeriesbyselectingonlynecessaryfields.3)UsecachingsystemslikeRedisorMemcachedtoreducedatabaseload.4)Applyasynch

Yes,itispossibletosendmassemailswithPHP.1)UselibrarieslikePHPMailerorSwiftMailerforefficientemailsending.2)Implementdelaysbetweenemailstoavoidspamflags.3)Personalizeemailsusingdynamiccontenttoimproveengagement.4)UsequeuesystemslikeRabbitMQorRedisforb

DependencyInjection(DI)inPHPisadesignpatternthatachievesInversionofControl(IoC)byallowingdependenciestobeinjectedintoclasses,enhancingmodularity,testability,andflexibility.DIdecouplesclassesfromspecificimplementations,makingcodemoremanageableandadapt

The best ways to send emails using PHP include: 1. Use PHP's mail() function to basic sending; 2. Use PHPMailer library to send more complex HTML mail; 3. Use transactional mail services such as SendGrid to improve reliability and analysis capabilities. With these methods, you can ensure that emails not only reach the inbox, but also attract recipients.

Calculating the total number of elements in a PHP multidimensional array can be done using recursive or iterative methods. 1. The recursive method counts by traversing the array and recursively processing nested arrays. 2. The iterative method uses the stack to simulate recursion to avoid depth problems. 3. The array_walk_recursive function can also be implemented, but it requires manual counting.

In PHP, the characteristic of a do-while loop is to ensure that the loop body is executed at least once, and then decide whether to continue the loop based on the conditions. 1) It executes the loop body before conditional checking, suitable for scenarios where operations need to be performed at least once, such as user input verification and menu systems. 2) However, the syntax of the do-while loop can cause confusion among newbies and may add unnecessary performance overhead.

Efficient hashing strings in PHP can use the following methods: 1. Use the md5 function for fast hashing, but is not suitable for password storage. 2. Use the sha256 function to improve security. 3. Use the password_hash function to process passwords to provide the highest security and convenience.


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