PHP | is_link( ) Function

PHP is_file( ) Function

Last Updated : 31 Mar, 2023

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

<?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

<?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 geeks!

Reference: http://php.net/manual/en/function.is-file.php

PHP | is_link( ) Function

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Shubrodeep Banerjee

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