PHP Fundamentals

Basic Syntax

All PHP code must be enclosed inside <? and ?> closing tags
echo outputs text.
<?  
In the previous example we first set the handle of the curl session to $ch. Then with the curl_setopt command we set the URL of the request to http://www.example.com. The CURLOPT_HEADER option sets whether or not the server response header should be returned. By default curl will display the response straight to the browser as the script is executed. To counter this we enabled the CURLOPT_RETURNTRANSFER option. Now when we run the curl_exec() statement the data returned from the remote server is returned and stored the the $data variable instead of passed to the browser.

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will display whatever is between the double quotes including the value of variables. Notice the used in the statement. The will escape the next character. Using a before special characters like " $ display the character. Using

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Curl Introduction

curl is the client URL function library. PHP supports it through libcurl. To enable support for libcurl when installing PHP add --with-curl=[location of curl libraries] to the configure statement before compiling. The curl package must be installed prior to installing PHP. Most major functions desired when connecting to remote web servers are included in curl, including POST and GET form posting, SSL support, HTTP authentication, session and cookie handling.
To start a curl session use the curl_init() function. Options for the curl session are set via the curl_setopt() PHP function. Once you have the options set execute the request with the curl_exec() function.
Example:

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