[PHP] Is a file included?

I'm not that new to PHP but i'm still learning how to do things OOP, so while I was re writing my website to be OOP today I came across a need for a function to check if a file was included or not.

I then wrote the function in my z.core.php file and then forgot why I needed to check, so here it is, if you want it.

PHP Code:

---

    public function is_included($filename)
    {
        $get = get_included_files();
        
        foreach($get as $file)
        {
            $included = realpath($filename);
            if($file == $included)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
    } 


---

& here is an example on how to use it:

PHP Code:

---

if(is_included("file.php")){
echo "file is included";
}
else{
die("not included, soz boz");
} 


---

There you go :-)

Jcat

Sorry, but what is this for? I don't completely understand, but thanks for contributing to RaGEZONE!

It's to check if a file is included for debugging purposes, eg something isn't working so you run that to see if the file is included. Sometimes when you include a file and include a file through that file it doesn't work :/

PHP: include_once - Manual

This doesn't include the file, it just checks if it is included

Looks interesting, might be useful for some people :).

sorry but your method looks flawed.

PHP Code:

---

<?php
public function is_included($filename) {
    $get = get_included_files();
    if(in_array(realpath($filename), $get)) {
        return true;
    } else {
        return false;
    }
}
?>

---

extra code to break up the array is not need when you can do a simple search inside the array and return true

Quote:

---

Originally Posted by holthelper

sorry but your method looks flawed.

PHP Code:

---

<?php
public function is_included($filename) {
    $get = get_included_files();
    if(in_array(realpath($filename), $get)) {
        return true;
    } else {
        return false;
    }
}
?>

---

extra code to break up the array is not need when you can do a simple search inside the array and return true

---

Thanks :)

I apologize if this is necroposting, but I'd hate to see someone actually use this code. If you want to do OOP properly -- without the overhead of verifying every file before use in every script each time it's requested:

PHP Code:

---

<?php

    set_error_handler(function($errno, $errstr, $errfile, $errline, $errcontext) {
        throw new Exception("Exception caught in " . $errfile . " on line " . $errline . ": " . $errstr, $errno);
        return true;
    });
    
    try {
        include_once("file.php");
    }
?>

---

or if you need your application to be really fast:

PHP Code:

---

<?php
    require_once("file.php");
?>

---

PHP Code:

---

<?php
public function is_included($filename) {
    return in_array(realpath($filename), get_included_files());
}
?>

---

O(n) solutions suck.

Suck hard, too.

Quote:

---

Originally Posted by sagenessamerda

PHP Code:

---

<?php
public function is_included($filename) {
    return in_array(realpath($filename), get_included_files());
}
?>

---

---

HA could have done that but wasnt thinking too much about it. if i took a sec more to look at it i would have came up with your function.

Quote:

---

Originally Posted by jMerliN

O(n) solutions suck.

Suck hard, too.

---

Because it results in code like this anyway?

PHP Code:

---

// way we did it without ur function
$f = realpath('some_file.php');

if( in_array($f, get_included_files()) )
{
    printf( "File, '%s' is included.", $f );
} else {
    include( $f );
}

// way we do it with ur function
function is_included($filename) 
{ 
    return in_array( realpath($filename), get_included_files() ); 
}

$f = 'some_file.php';

if( is_included($f) )
{
    printf( "File, '%s' is included.", $f );
} else {
    include( $f );
} 


---

When actually it could be avoided entirely using this,

PHP Code:

---

require_once( 'some_file.php' ); 


---

which also resembles O(n).. Shit, almost everything in PHP does.

I think in PHP that's accepted by now.

Quote:

---

Originally Posted by s-p-n

Because it results in code like this anyway?

PHP Code:

---

// way we did it without ur function
$f = realpath('some_file.php');

if( in_array($f, get_included_files()) )
{
    printf( "File, '%s' is included.", $f );
} else {
    include( $f );
}

// way we do it with ur function
function is_included($filename) 
{ 
    return in_array( realpath($filename), get_included_files() ); 
}

$f = 'some_file.php';

if( is_included($f) )
{
    printf( "File, '%s' is included.", $f );
} else {
    include( $f );
} 


---

When actually it could be avoided entirely using this,

PHP Code:

---

require_once( 'some_file.php' ); 


---

which also resembles O(n).. Shit, almost everything in PHP does.

I think in PHP that's accepted by now.

---

I doubt that's O(n). Using a simple hash table you can achieve O(1) expected time.

Quote:

---

Originally Posted by jMerliN

I doubt that's O(n). Using a simple hash table you can achieve O(1) expected time.

---

In PHP, associative arrays are implemented as hash tables. Any operation that does not involve iteration is O(1).