fopen PHP Not Working With Solution

In this article, we will discuss and provide a solution, why fopen PHP not working. There are some instances as a developer that we are going to see this kind of error in our programs.

What is fopen() function?

In PHP, fopen() is a built-in function which is used to open a file or a URL.

Syntax:

fopen(filename, mode, include_path, context)

Parameters values:

`mode`	Description
`'r'`	Open for reading only; place the file pointer at the beginning of the file.
`'r+'`	Open for reading and writing; place the file pointer at the beginning of the file.
`'w'`	Open for writing only; place the file pointer at the beginning of the file and truncate the file to zero length. If the file does not exist, attempt to create it.
`'w+'`	Open for reading and writing; otherwise, it has the same behavior as `'w'`.
`'a'`	Open for writing only; place the file pointer at the end of the file. If the file does not exist, attempt to create it. In this mode, fseek() has no effect, writes are always appended.
`'a+'`	Open for reading and writing; place the file pointer at the end of the file. If the file does not exist, attempt to create it. In this mode, fseek() only affects the reading position, writes are always appended in terms of service.
`'x'`	Create and open for writing only; place the file pointer at the beginning of the file. If the file already exists, the fopen() call will fail by returning `false` and generating an error in level `E_WARNING`. If the file does not exist, attempt to create it. This is equivalent to specifying `O_EXCL\|O_CREAT` flags for the underlying `open(2)` system call.
`'x+'`	Create and open for reading and writing; otherwise it has the same behavior as `'x'`.
`'c'`	Open the file for writing only. If the file does not exist, it is created. If it exists, it is neither truncated (as opposed to `'w'`), nor the call to this function fails (as is the case with `'x'`). The file pointer is positioned at the beginning of the file. This may be useful if it’s desired to get an advisory lock (see flock()) before attempting to modify the file, as using `'w'` could truncate the file before the lock was obtained (if truncation is desired, ftruncate() can be used after the lock is requested on var dump).
`'c+'`	Open the file for reading and writing; otherwise it has the same behavior as `'c'`.
`'e'`	Set close-on-exec flag on the opened file descriptor. Only available in PHP compiled on POSIX.1-2008 conform systems.

Why fopen is not working in PHP?

The fopen is not working once the PHP has decided that a filename does not specify a registered protocol.

The PHP will check twice to make sure that the allow_url_fopen function is enabled otherwise once it was disabled the PHP will (emit) a warning and the fopen will not work.

For example:

<?php

  	$book="http://bittotb.com/synthesis_study_material/student_admin/include/uploaded/epub/923960_hotel (1).epub";
    $path=$book.".php";
    $myfile =fopen($path, "w");
    $txt = "<?php include('hello.php'); ?>";
    fwrite($myfile, $txt);
    fclose($myfile);
    
?>

In the sample program above we are using a fopen and fwrite at the same time.

Furthermore, when we write the file name in the fopen function, it will look like below.

$myfile =fopen("abc.php", "w");

The problem is that they make a file where the directory is the same. However, if I use the path, the fopen will fail and the $path will produce the result shown below.

http://bittotb.com/synthesis_study_material/student_admin/include/uploaded/epub/923960_hotel (1).epub.php

How to solve fopen is not working in PHP?

To simply solved this kind of issue or problem as we based the problem on the example above the solution is not much tricky. We just need to understand it and read it thoroughly in order to solve this kind of issue.

For example:

Once your page has a URL of http://example.org/index.php. The file can be found on the server also known as /var/www/example.org/index.php.

The simple way to determine the directory is to use the following code.

<?php
echo getcwd();

Another example if you have page like http://example.org/index.php and you want it to create like this http://example.org/test.php. You can simply use the code below to solve the fopen which is not working or producing an error reporting.

$file = fopen("test.php", "w");
fwrite($file, "<?php echo 'Hello World'; ?>");
fflush($file);
fclose($file);

How does fopen work in PHP?

The fopen() function simply works by just opening a file or URL. If these functions will return false the fp or fopen() function it will automatically fail to open stream.

Does fopen create a new file PHP?

In PHP, fopen() is a function that can be also used to create a file in the include and allows you to search for the file. I know it was a little bit confusing, but this function in PHP can be used to create a file and open a file and URL.

In addition, if the fopen() is used on that particular text file and the file does not exist it will generate a file automatically and allowed the file to opened for (writing 'w') or (appending 'a') in the mode parameter.

Summary

This article discusses the fopen PHP Not Working and also provide a simple solution and also tackles how fopen work and fopen create a new file.

I hope this lesson has helped you learn a lot. Check out my previous and latest articles for more life-changing tutorials that could help you a lot.