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Php in the use of fopen function is how, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, hope you can gain something.

The usage of the fopen function in php: [fopen (filename,mode,include_path,context)]. The fopen () function is used to open a file or url and returns false with an error message if it fails.

This article operating environment: windows10 system, php7, thinkpad T480 computer.

Let's first take a brief look at the definition and return value of the fopen () function.

The fopen () function is used to open a file or URL, and if the fopen () function fails, it returns FALSE with an error message. Of course, we can hide the error output by adding an'@ 'before the function name.

Let's take a look at its syntax:

Fopen (filename,mode,include_path,context)

Parameter description:

Filename: specifies the file or URL to open.

Mode: specifies the type of access required to the file / stream.

Include_path: optional, if you also need to retrieve files in include_path, you can set this parameter to 1 or TRUE.

Context: optional, specifies the environment of the file handle. Context is a set of options that can modify the behavior of the stream.

Finally, let's look at an example of using the fopen () function:

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