You should escape each double quote within the HTML code with a backslash. In most cases this is. Below you can view the "handlers", which will have to be added in order to achieve this. While this looks a bit complicated, it actually saves you a lot of code. Usually, for such forms two files are created - the first one is the HTML form itself and the second one is the backend PHP file, which does all the work.
A typical example is including the header, footer and menu file within all the pages of a website. The basic syntax of the include and require statement can be given with:. Tip: Like the print and echo statements, you can omit the parentheses while using the include and require statements as demonstrated above.
The following example will show you how to include the common header, footer and menu codes which are stored in separate 'header. Using this technique you can update all pages of the website at once by making the changes to just one file, this saves a lot of repetitive work. Learn more. Asked 7 years, 7 months ago. Active 7 years, 7 months ago. Viewed times. The code only works for html files and I don't know why. Improve this question. Ignacio Correia. Ignacio Correia Ignacio Correia 5 5 bronze badges.
Add a comment. Active Oldest Votes. This can be done in few ways: system command exec command using handles using backticks The HTML "works" normally because HTML is interpreted by the browser and PHP is server-side language which must be executed in adequate environment.
This is not, however, possible when including remote files unless the output of the remote file has valid PHP start and end tags as with any local file. You can declare the needed variables within those tags and they will be introduced at whichever point the file was included. Because include is a special language construct, parentheses are not needed around its argument.
Take care when comparing return value. Example 4 Comparing return value of include. Example 5 include and the return statement. Notice the difference between the above examples. The first uses return within the included file while the other does not. If there are functions defined in the included file, they can be used in the main file independent if they are before return or after.
If the file is included twice, PHP will raise a fatal error because the functions were already declared. Another way to "include" a PHP file into a variable is to capture the output by using the Output Control Functions with include.
For example:. Example 6 Using output buffering to include a PHP file into a string. Note : Because this is a language construct and not a function, it cannot be called using variable functions. Submit a Pull Request Report a Bug. Example 1 Basic include example vars. Warning Security warning Remote file may be processed at the remote server depending on the file extension and the fact if the remote server runs PHP or not but it still has to produce a valid PHP script because it will be processed at the local server.
Example 5 include and the return statement return. Move the includeFile s out of the document root of your project. As example 3 points out, it is possible to include a php file from a remote server. The LFI and RFI vulnerabilities occur when you use an input variable in the include statement without proper input validation.
Suppose you have an example. However, it opens up an RFI vulnerability.
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