PHP curlopt_postfields parameter uses array and string differences _php tutorial

This article to introduce the PHP curlopt_postfields parameters using the difference between the array and the string, you have to understand the friends do not go into the reference.

The Curl component of PHP is a very common HTTP request simulator.

When I usually send post data, I'm used to writing this:
curl_setopt ($ch, Curlopt_postfields, $post _data);
However, when sending a request to a server, the server returns 500. Using the socket connection to send the request, return the normal data.

Try sending to a Web page where you can see that when you send post data using an array, you receive the following content_type:

The code is as follows	Copy Code
[Content_Type] = Multipart/form-data; boundary= —————————-f924413ea122 Using Http_build_query ($post _data), the Content_Type received are as follows: [Content_Type] = application/x-www-form-urlencoded

It is visible that the HTTP header sends content_type:application/x-www-form-urlencoded when Curlopt_postfields is set to an array. This is a normal Web page.

The header that the browser sends when the form is submitted. And Multipart/form-data We know it's a form for uploading files. Includes the boundary delimiter, which is a lot more bytes.

The manual mentions:

The full data to post in a HTTP "post" operation. To post a file, prepend a filename with @ and use the full path. This can either is passed as a urlencoded string like ' Para1=val1&para2=val2& ... ' or as an array with the field name As key and field data as value. If value is an array, the Content-type header would be set to Multipart/form-data.

When using an array to provide post data, the Curl component is presumably intended to be compatible with the @filename of this upload file, by default Content_Type is set to Multipart/form-data. While there is no impact on most Web servers, there are still a few servers that are incompatible.

This article concludes that, in the absence of the need to upload files, as far as possible to the post submitted data http_build_query, and then sent out, to achieve better compatibility, smaller request packets.

The values of the following options are used as long shapes (specified in the option parameter):

curlopt_infilesize: When you upload a file to a remote site, this option tells PHP the size of your upload file.
Curlopt_verbose: If you want curl to report every unexpected thing, set this option to a value other than 0.
Curlopt_header: If you want to include a header in the output, set this option to a value other than 0.
curlopt_noprogress: If you do not have PHP display a process bar for the Curl transfer, set this option to a value other than 0. Note: PHP automatically sets this option to a value other than 0, you should only change this option for debugging purposes.
curlopt_nobody: If you do not want to include the body part in the output, set this option to a value other than 0.
Curlopt_failonerror: If you want PHP to not display when an error occurs (HTTP code returns greater than or equal to 300), set this option to one person other than 0 value. The default behavior is to return a normal page, ignoring the code.
curlopt_upload: If you want PHP to prepare for uploading, set this option to a value other than 0.
Curlopt_post: If you want PHP to do a regular HTTP POST, set this option to a value other than 0. This post is an ordinary application/x-www-from-urlencoded type, most of which is used by HTML forms.
curlopt_ftplistonly: Set this option to a value other than 0, PHP lists the list of directory names for FTP.
curlopt_ftpappend: Set this option to a value other than 0, PHP will apply the remote file instead of overwriting it.
CURLOPT_NETRC: Set this option to a value other than 0, PHP will look in your ~./netrc file for the user name and password of the remote site you want to connect to.
curlopt_followlocation: Set this option to a non-0 value (like "Location:") header, the server will send it as part of the HTTP header (note that this is recursive, PHP will be sent as "location:" the head).
curlopt_put: Set this option to use HTTP to upload a file for a value other than 0. To upload this file you must set the Curlopt_infile and Curlopt_infilesize options.
Curlopt_mute: Set this option to a value other than 0, PHP will be completely silent for the curl function.
curlopt_timeout: Sets a long shape number, as the maximum continuation of how many seconds.
curlopt_low_speed_limit: Sets a long shaping number to control how many bytes are transferred.
curlopt_low_speed_time: Sets a long shape number that controls how many seconds to transmit curlopt_low_speed_limit the specified number of bytes.
Curlopt_resume_from: Pass a long shaping parameter that contains the byte offset address (the start form you want to transfer to).
curlopt_sslversion: Pass a long parameter that contains the SSL version. The default PHP will be determined by its own efforts, and in more security you must set it up manually.
curlopt_timecondition: Passes a long parameter that specifies how the Curlopt_timevalue parameter is handled. You can set this parameter to Timecond_ifmodsince or timecond_isunmodsince. This is used only for HTTP.
Curlopt_timevalue: Passes a number of seconds from 1970-1-1 onwards to the present. This time will be used by the Curlopt_timevalue option as the specified value, or by default timecond_ifmodsince.

The values of the following options will be used as strings:

Curlopt_url: This is the URL address you want to retrieve with PHP. You can also set this option when initializing with the Curl_init () function.
curlopt_userpwd: Pass a shape like [Username]:[password] style string, function PHP to connect.
curlopt_proxyuserpwd: Pass a string that is formatted as [Username]:[password] to connect to the HTTP proxy.
Curlopt_range: Pass a range that you want to specify. It should be in the "X-y" format, except for X. or Y. HTTP delivery also supports several intervals, separated by a phrase (x-y,n-m).
Curlopt_postfields: A string that passes all data as an HTTP "POST" operation.
Curlopt_referer: A string that contains a "REFERER" header in an HTTP request.
curlopt_useragent: A string that contains a "user-agent" header in an HTTP request.
Curlopt_ftpport: Pass an IP address that contains the FTP "POST" instruction used. This post command tells the remote server to connect to the IP address we specified. This string can be an IP address, a host name, a network interface name (under Unix), or '-' (using the system default IP address).
Curlopt_cookie: Passes a header connection that contains an HTTP COOKIE.
Curlopt_sslcert: Pass a string containing a certificate in PEM format.
curlopt_sslcertpasswd: Pass a password that contains required to use the Curlopt_sslcert certificate.
Curlopt_cookiefile: A string that passes the name of a file that contains cookie data. This cookie file can be a Netscape format, or an HTTP-style header that is stockpiled in a file.
curlopt_customrequest: When an HTTP request is made, passing a character is used by get or head. For a delete or other operation is beneficial, more pass a string to is used instead of GET or HEAD when doing an HTTP request. This was useful for doing or another, and more obscure, HTTP request. Note: Do not do this before confirming your server support commands. The following options require a file description (obtained by using the fopen () function):
curlopt_file: This file will be the output file you put in the transfer, the default is stdout.
Curlopt_infile: This file is the input file you sent over.
Curlopt_writeheader: This file is written with the head part of your output.
Curlopt_stderr: This file is written with errors rather than STDERR. To get an example of a page that needs to be signed in, the current practice is to log in once every time, and the person who needs to do it is improved.

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