PHP的CURL簡(jiǎn)單介紹
Jun 13, 2016 am 10:42 AM
什么是CURL,PHP與CURL
（PHP CURL）
一 什么是CURL
curl是一個(gè)利用URL語(yǔ)法在命令行方式下工作的文件傳輸工具。curl是一個(gè)利用URL語(yǔ)法在命令行方式下工作的文件傳輸工具。
它支持很多協(xié)議：FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE 以及 LDAP。curl同樣支持HTTPS認(rèn)證，HTTP POST方法, HTTP PUT方法, FTP上傳, kerberos認(rèn)證, HTTP上傳, 代理服務(wù)器, cookies, 用戶(hù)名/密碼認(rèn)證, 下載文件斷點(diǎn)續(xù)傳,
上載文件斷點(diǎn)續(xù)傳, http代理服務(wù)器管道（ proxy tunneling）, 甚至它還支持IPv6, socks5代理服務(wù)器, 通過(guò)http代理服務(wù)器上傳文件到FTP服務(wù)器等等，功能十分強(qiáng)大。
原來(lái)php默認(rèn)并不進(jìn)行此項(xiàng)功能的擴(kuò)展，但還是有的，只是沒(méi)有讓它生效罷了。打開(kāi)PHP安裝目錄，搜索以下三個(gè)文件 ssleay32.dll、libeay32.dll和 php_curl.dll，
一一拷貝到系統(tǒng)目錄下的system32文件夾下，修改php.ini文件，找到;extension= php_curl.dll行，去掉前面的;號(hào)，保存，重啟服務(wù)器
網(wǎng)站采集，登陸，COOKIE等
二 PHP中的CURL庫(kù)
curl_close - 關(guān)閉一個(gè)curl會(huì)話
curl_copy_handle - 拷貝一個(gè)curl連接資源的所有內(nèi)容和參數(shù)
curl_errno - 返回一個(gè)包含當(dāng)前會(huì)話錯(cuò)誤信息的數(shù)字編號(hào)
curl_error - 返回一個(gè)包含當(dāng)前會(huì)話錯(cuò)誤信息的字符串
curl_exec - 執(zhí)行一個(gè)curl會(huì)話
curl_getinfo - 獲取一個(gè)curl連接資源句柄的信息
curl_init - 初始化一個(gè)curl會(huì)話
curl_multi_add_handle - 向curl批處理會(huì)話中添加單獨(dú)的curl句柄資源
curl_multi_close - 關(guān)閉一個(gè)批處理句柄資源
curl_multi_exec - 解析一個(gè)curl批處理句柄
curl_multi_getcontent - 返回獲取的輸出的文本流
curl_multi_info_read - 獲取當(dāng)前解析的curl的相關(guān)傳輸信息
curl_multi_init - 初始化一個(gè)curl批處理句柄資源
curl_multi_remove_handle - 移除curl批處理句柄資源中的某個(gè)句柄資源
curl_multi_select - Get all the sockets associated with the cURL extension, which can then be "selected"
curl_setopt_array - 以數(shù)組的形式為一個(gè)curl設(shè)置會(huì)話參數(shù)
curl_setopt - 為一個(gè)curl設(shè)置會(huì)話參數(shù)
curl_version - 獲取curl相關(guān)的版本信息
curl_init()函數(shù)的作用初始化一個(gè)curl會(huì)話，curl_init()函數(shù)唯一的一個(gè)參數(shù)是可選的，表示一個(gè)url地址。
curl_exec()函數(shù)的作用是執(zhí)行一個(gè)curl會(huì)話，唯一的參數(shù)是curl_init()函數(shù)返回的句柄。
curl_close()函數(shù)的作用是關(guān)閉一個(gè)curl會(huì)話，唯一的參數(shù)是curl_init()函數(shù)返回的句柄。
三關(guān)于CURL_SETOPT()函數(shù)的設(shè)置
bool curl_setopt (int ch, string option, mixed value)
curl_setopt()函數(shù)將為一個(gè)CURL會(huì)話設(shè)置選項(xiàng)。option參數(shù)是你想要的設(shè)置，value是這個(gè)選項(xiàng)給定的值。
下列選項(xiàng)的值將被作為長(zhǎng)整形使用(在option參數(shù)中指定)：
* CURLOPT_INFILESIZE: 當(dāng)你上傳一個(gè)文件到遠(yuǎn)程站點(diǎn)，這個(gè)選項(xiàng)告訴PHP你上傳文件的大小。
* CURLOPT_VERBOSE: 如果你想CURL報(bào)告每一件意外的事情，設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值。
* CURLOPT_HEADER: 如果你想把一個(gè)頭包含在輸出中，設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值。
* CURLOPT_NOPROGRESS: 如果你不會(huì)PHP為CURL傳輸顯示一個(gè)進(jìn)程條，設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值。注意：PHP自動(dòng)設(shè)置這個(gè)選項(xiàng)為非零值，你應(yīng)該僅僅為了調(diào)試的目的來(lái)改變這個(gè)選項(xiàng)。
* CURLOPT_NOBODY: 如果你不想在輸出中包含body部分，設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值。
* CURLOPT_FAILONERROR: 如果你想讓PHP在發(fā)生錯(cuò)誤(HTTP代碼返回大于等于300)時(shí)，不顯示，設(shè)置這個(gè)選項(xiàng)為一人非零值。默認(rèn)行為是返回一個(gè)正常頁(yè)，忽略代碼。
* CURLOPT_UPLOAD: 如果你想讓PHP為上傳做準(zhǔn)備，設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值。
* CURLOPT_POST: 如果你想PHP去做一個(gè)正規(guī)的HTTP POST，設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值。這個(gè)POST是普通的 application/x-www-from-urlencoded 類(lèi)型，多數(shù)被HTML表單使用。
* CURLOPT_FTPLISTONLY: 設(shè)置這個(gè)選項(xiàng)為非零值，PHP將列出FTP的目錄名列表。
* CURLOPT_FTPAPPEND: 設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值，PHP將應(yīng)用遠(yuǎn)程文件代替覆蓋它。
* CURLOPT_NETRC: 設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值，PHP將在你的 ~./netrc 文件中查找你要建立連接的遠(yuǎn)程站點(diǎn)的用戶(hù)名及密碼。
* CURLOPT_FOLLOWLOCATION: 設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值(象 “Location: “)的頭，服務(wù)器會(huì)把它當(dāng)做HTTP頭的一部分發(fā)送(注意這是遞歸的，PHP將發(fā)送形如 “Location: “的頭)。
* CURLOPT_PUT: 設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值去用HTTP上傳一個(gè)文件。要上傳這個(gè)文件必須設(shè)置CURLOPT_INFILE和CURLOPT_INFILESIZE選項(xiàng).
* CURLOPT_MUTE: 設(shè)置這個(gè)選項(xiàng)為一個(gè)非零值，PHP對(duì)于CURL函數(shù)將完全沉默。
* CURLOPT_TIMEOUT: 設(shè)置一個(gè)長(zhǎng)整形數(shù)，作為最大延續(xù)多少秒。
* CURLOPT_LOW_SPEED_LIMIT: 設(shè)置一個(gè)長(zhǎng)整形數(shù)，控制傳送多少字節(jié)。
* CURLOPT_LOW_SPEED_TIME: 設(shè)置一個(gè)長(zhǎng)整形數(shù)，控制多少秒傳送CURLOPT_LOW_SPEED_LIMIT規(guī)定的字節(jié)數(shù)。
* CURLOPT_RESUME_FROM: 傳遞一個(gè)包含字節(jié)偏移地址的長(zhǎng)整形參數(shù)，(你想轉(zhuǎn)移到的開(kāi)始表單)。
* CURLOPT_SSLVERSION: 傳遞一個(gè)包含SSL版本的長(zhǎng)參數(shù)。默認(rèn)PHP將被它自己努力的確定，在更多的安全中你必須手工設(shè)置。
* CURLOPT_TIMECONDITION: 傳遞一個(gè)長(zhǎng)參數(shù)，指定怎么處理CURLOPT_TIMEVALUE參數(shù)。你可以設(shè)置這個(gè)參數(shù)為T(mén)IMECOND_IFMODSINCE 或 TIMECOND_ISUNMODSINCE。這僅用于HTTP。
* CURLOPT_TIMEVALUE: 傳遞一個(gè)從1970-1-1開(kāi)始到現(xiàn)在的秒數(shù)。這個(gè)時(shí)間將被CURLOPT_TIMEVALUE選項(xiàng)作為指定值使用，或被默認(rèn)TIMECOND_IFMODSINCE使用。
下列選項(xiàng)的值將被作為字符串：
* CURLOPT_URL: 這是你想用PHP取回的URL地址。你也可以在用curl_init()函數(shù)初始化時(shí)設(shè)置這個(gè)選項(xiàng)。
* CURLOPT_USERPWD: 傳遞一個(gè)形如[username]:[password]風(fēng)格的字符串,作用PHP去連接。
* CURLOPT_PROXYUSERPWD: 傳遞一個(gè)形如[username]:[password] 格式的字符串去連接HTTP代理。
* CURLOPT_RANGE: 傳遞一個(gè)你想指定的范圍。它應(yīng)該是”X-Y”格式，X或Y是被除外的。HTTP傳送同樣支持幾個(gè)間隔，用逗句來(lái)分隔(X-Y,N-M)。
* CURLOPT_POSTFIELDS: 傳遞一個(gè)作為HTTP “POST”操作的所有數(shù)據(jù)的字符串。
* CURLOPT_REFERER: 在HTTP請(qǐng)求中包含一個(gè)”referer”頭的字符串。
* CURLOPT_USERAGENT: 在HTTP請(qǐng)求中包含一個(gè)”user-agent”頭的字符串。
* CURLOPT_FTPPORT: 傳遞一個(gè)包含被ftp “POST”指令使用的IP地址。這個(gè)POST指令告訴遠(yuǎn)程服務(wù)器去連接我們指定的IP地址。這個(gè)字符串可以是一個(gè)IP地址，一個(gè)主機(jī)名，一個(gè)網(wǎng)絡(luò)界面名 (在UNIX下)，或是‘-’(使用系統(tǒng)默認(rèn)IP地址)。
* CURLOPT_COOKIE: 傳遞一個(gè)包含HTTP cookie的頭連接。
* CURLOPT_SSLCERT: 傳遞一個(gè)包含PEM格式證書(shū)的字符串。
* CURLOPT_SSLCERTPASSWD: 傳遞一個(gè)包含使用CURLOPT_SSLCERT證書(shū)必需的密碼。
* CURLOPT_COOKIEFILE: 傳遞一個(gè)包含cookie數(shù)據(jù)的文件的名字的字符串。這個(gè)cookie文件可以是Netscape格式，或是堆存在文件中的HTTP風(fēng)格的頭。
* CURLOPT_CUSTOMREQUEST: 當(dāng)進(jìn)行HTTP請(qǐng)求時(shí)，傳遞一個(gè)字符被GET或HEAD使用。為進(jìn)行DELETE或其它操作是有益的，更Pass a string to be used instead of GET or HEAD when doing an HTTP request. This is useful for doing or another, more obscure, HTTP request. 注意: 在確認(rèn)你的服務(wù)器支持命令先不要去這樣做。下列的選項(xiàng)要求一個(gè)文件描述(通過(guò)使用fopen()函數(shù)獲得)：
* CURLOPT_FILE: 這個(gè)文件將是你放置傳送的輸出文件，默認(rèn)是STDOUT.
* CURLOPT_INFILE: 這個(gè)文件是你傳送過(guò)來(lái)的輸入文件。
* CURLOPT_WRITEHEADER: 這個(gè)文件寫(xiě)有你輸出的頭部分。
* CURLOPT_STDERR: 這個(gè)文件寫(xiě)有錯(cuò)誤而不是stderr。用來(lái)獲取需要登錄的頁(yè)面的例子,當(dāng)前做法是每次或許都登錄一次,有需要的人再做改進(jìn)了.
四 相關(guān)例子
1 例子
view plaincopy to clipboardprint?
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$cookie_jar = tempnam(./tmp,cookie);??
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$ch = curl_init(); curl_setopt($ch,CURLOPT_URL,http://******);??
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curl_setopt($ch, CURLOPT_POST, 1);??
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$request = email_address=&password=&action=;??
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curl_setopt($ch, CURLOPT_POSTFIELDS, $request);??
//把返回來(lái)的cookie信息保存在$cookie_jar文件中??
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curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_jar);??
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//設(shè)定返回的數(shù)據(jù)是否自動(dòng)顯示??
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);??
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//設(shè)定是否顯示頭信息??
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curl_setopt($ch, CURLOPT_HEADER, false);??
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//設(shè)定是否輸出頁(yè)面內(nèi)容??
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curl_setopt($ch, CURLOPT_NOBODY, false);??
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curl_exec($ch);??
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curl_close($ch); //get data after login??
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$ch2 = curl_init();??
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curl_setopt($ch2, CURLOPT_URL, http://*****);??
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curl_setopt($ch2
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