The is_file() function in PHP is an inbuilt function which is used to check whether the specified file is a regular file or not. The name of the file is sent as a parameter to the is_file() function and it returns True if the file is a regular file else it returns False.
Syntax:
bool is_file($file)
Parameters Used:
The is_file() function in PHP accepts one parameter.
- $file: It is a mandatory parameter which specifies the file.
Return Value:
It returns True if the file is a regular file else it returns false.
Exceptions:
- An E_WARNING is emitted on failure.
- The result of this function are cached and therefore the clearstatcache() function is used to clear the cache.
- is_file() function returns false for non-existent files.
- is_file() function may return unexpected results for files which are larger than 2GB since PHP’s integer type is signed and many platforms use 32bit integers.
Below programs illustrate the is_file() function.
Program 1:
<?php $myfile = "gfg.txt"; // checking whether the file is a // regular file or not if (is_file($myfile)) { echo ("$myfile: regular file!"); } else { echo ("$myfile: not a regular file!"); } ?> |
Output:
gfg.txt: regular file!
Program 2
<?php $myfile = "gfg.txt"; // checking whether the file is a // regular file or not if (is_file($myfile)) { echo ("$myfile: regular file!"); // display the content of regular file echo "Contents of the file are :\n"; readfile($myfile); } else { echo ("$myfile: not a regular file!"); } ?> |
Output:
gfg.txt: regular file! Contents of the file are : Portal for neveropen!
