php 中使用cURL发送get/post请求,上传图片,批处理
cURL是利用url语法规定传输文件和数据的工具。php中有curl拓展,一般用来实现网络抓取,模拟发送get post请求,文件上传。 在php中建立curl的基本步骤如下: 1 初始化 2 设置选项,包括url 3 执行并获取结果 4 释放curl句柄。 在工作和学习中,我也是时常用
cURL是利用url语法规定传输文件和数据的工具。php中有curl拓展,一般用来实现网络抓取,模拟发送get post请求,文件上传。
在php中建立curl的基本步骤如下:
1 初始化 2 设置选项,包括url 3 执行并获取结果 4 释放curl句柄。
在工作和学习中,我也是时常用的curl。由于在使用curl设置选项时,各种选项比较难以记忆,需要参考,故在此记录下常用的一些例子,以便后来参考。
实例一 : 抓取网页数据(以拉手网开放api为例,也是get请求)
<?php header("Content-type: text/html; charset=utf-8"); $ch = curl_init();//初始化 /*============开始设置curl各种选项================*/ curl_setopt($ch, CURLOPT_URL, "http://open.lashou.com/opendeals/lashou/city.xml"); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $html = curl_exec($ch);//执行句柄,获取返回内容 curl_close($ch);//释放句柄 echo $html ?>
如果用这种方法发get请求,参数附加到url后面即可
如curl_setopt($ch, CURLOPT_URL, "http://localhost/tqj/date/p822.php?name=yyyyy");
实例 2 利用curl发送post请求
<?php $uri = "http://localhost/tqj/date/p822.php"; // post参数数组 $data = array ( 'name' => 'tianquanjun', 'password' => 'tianquanjun', ); //初始化 $ch = curl_init (); //各种项设置,网上参考而来,可以查看php手册,自己设置 curl_setopt ( $ch, CURLOPT_URL, $uri ); curl_setopt ( $ch, CURLOPT_POST, 1 );//post方式 curl_setopt ( $ch, CURLOPT_HEADER, 0 ); curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 ); curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data ); //执行 $return = curl_exec ( $ch ); //释放 curl_close ( $ch ); print_r($return); ?>
实例三 :curl 过程调试与错误信息处理
<?php $uri = "http://localhost/tqj/date/p822.php"; // post参数数组 $data = array ( 'name' => 'tianquanjun', 'password' => 'tianquanjun', ); //初始化 $ch = curl_init (); //各种项设置,网上参考而来,可以查看php手册,自己设置 curl_setopt ( $ch, CURLOPT_URL, $uri ); curl_setopt ( $ch, CURLOPT_POST, 1 );//post方式 curl_setopt ( $ch, CURLOPT_HEADER, 0 ); curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 ); curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data ); //执行 $return = curl_exec ( $ch ); <span>//容错机制 if($return === false){ var_dump(curl_error($ch)); } //curl_getinfo()获取各种运行中信息,便于调试 $info = curl_getinfo($ch); echo "执行时间".$info['total_time'].PHP_EOL;</span> //释放 curl_close ( $ch ); print_r($return); ?>
其中利用curl_error()获取错误信息,curl_getinfo()获取运行相关信息。
实例四 上传图片,获取返回信息。跨域上传图片,同时获取返回信息,这个就能大显身手。和post比较像,注意文件之前加一个@符号
<?php $uri = "http://localhost/tqj/date/p822.php"; // post参数数组 $data = array ( 'author' => 'tianquanjun', 'upload' => '@C:\Users\tianquanjun.DANGDANG\Pictures\a.jpg', ); //初始化 $ch = curl_init (); //各种项设置,网上参考而来,可以查看php手册,自己设置 curl_setopt ( $ch, CURLOPT_URL, $uri ); curl_setopt ( $ch, CURLOPT_POST, 1 );//post方式 curl_setopt ( $ch, CURLOPT_HEADER, 0 ); curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 ); curl_setopt ( $ch, CURLOPT_POSTFIELDS, $data ); //执行 $return = curl_exec ( $ch ); //容错机制 if($return === false){ var_dump(curl_error($ch)); } //curl_getinfo()获取各种运行中信息,便于调试 $info = curl_getinfo($ch); echo "执行时间".$info['total_time'].PHP_EOL; //释放 curl_close ( $ch ); print_r($return); ?>
实例五 : curl批处理。
curl有一个高级特性,批处理句柄。允许打开多个curl链接。
批处理就是打开多个curl句柄,并把这些句柄指派给一个批处理句柄,然后在while循环里等待处理完毕。curl_multi_exec()算是称得上多线程处理,不过它还是属于异步的范畴。
<?php header("Content-type: text/html; charset=gbk"); $urls=array('http://www.baidu.com','http://www.qq.com/'); $ch=array(); //批处理句柄 $mh=curl_multi_init(); //打开多个curl句柄,并指派给一个批处理句柄 $ch[0]=curl_init($urls[0]); $ch[1]=curl_init($urls[1]); for($i=0;$i<2;$i++) { curl_setopt($ch[$i],CURLOPT_RETURNTRANSFER,1); curl_multi_add_handle($mh,$ch[$i]); } $running = NULL; do{ usleep(10000); curl_multi_exec($mh,$running);//实现批处理,可以看做curl多线程,实际是异步范畴 }while($running>0); $res=array(); for($j=0;$j
基本算是列举了常用的一些实例。要想灵活运用curl,还是得熟悉curl的各个设置项,这些设置项才是curl的灵魂。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
