is_file returns TRUE but include fails on same file

Question

When I run the following script:

<html>
<head>
<title>Example</title>
</head>
<?php
echo get_include_path(), "\n";

var_dump(is_file('/usr/lib/php/HTTP/OAuth.php'));
?>
<body>
</body>
</html>

I get the following output on the rendered page:

.:/php/includes:/usr/lib/php:/usr/lib/php/PEAR bool(true)

However, if I run this script:

<html>
<head>
<title>Example</title>
</head>
<?php
echo get_include_path(), "\n";

var_dump(is_file('/usr/lib/php/HTTP/OAuth.php'));

#### NEW SECTION ####

if (include(''/usr/lib/php/HTTP/OAuth.php'') == 'OK') {
echo 'INCLUDE OK, "\n"';
} else { echo 'INCLUDE FAILED \n' ; }

#### END NEW SECTION ####

?>
<body>
</body>
</html>

I get the following output:

.:/php/includes:/usr/lib/php:/usr/lib/php/PEAR bool(true) INCLUDE FAILED \n

Why would the include fail if the file is said to exist already?

uname output in case it is helpful:

Darwin 70cd606c7510 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun  7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386 i386

Thank you for your help.

John

''/usr/lib/php/HTTP/OAuth.php'' is a syntax error. Are you sure that's it? — deceze
– deceze ♦, Commented Jan 15, 2012 at 4:48

Community · Accepted Answer · 2023-11-17 20:38:18Z

3

You should have read Example #4 on the PHP help page:

<?php
// won't work, evaluated as include(('vars.php') == 'OK'), i.e. include('')
if (include('vars.php') == 'OK') {
    echo 'OK';
}

// works
if ((include 'vars.php') == 'OK') {
    echo 'OK';
}
?>

Also, are the double single quotes in your original code a typo?

edited Nov 17, 2023 at 20:38

CommunityBot

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answered Jan 15, 2012 at 4:51

animuson♦

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7 Comments

user1150051 Over a year ago

Thanks for the feedback @animuson and to everyone who read my post. I removed the double quotes and made the change you suggested, and I still get the same result (boolean returns true but the include does not return 'OK'). See updated code below:

<html> <head> <title>Example</title> </head> <?php echo get_include_path(), "\n";  var_dump(is_file('/usr/lib/php/HTTP/OAuth.php'));  #### NEW SECTION ####  if (include '/usr/lib/php/HTTP/OAuth.php' == 'OK') { echo 'INCLUDE OK, "\n"'; } else { echo 'INCLUDE FAILED \n' ; }  #### END NEW SECTION ####  ?> <body> </body> </html>

animuson Over a year ago

Does that file actually return 'OK'? An include by default will not return anything, the file has to return something to compare too.

user1150051 Over a year ago

var_dump prints true ... here is the output from running the script: .:/php/includes:/usr/lib/php:/usr/lib/php/PEAR bool(true) INCLUDE FAILED \n

animuson Over a year ago

That just means the file exists. Also, your include statement should be ((include '/usr/lib/php/HTTP/OAuth.php') == 'OK') and the file that you're including actually has to return the value 'OK' (return 'OK';) in order for that conditional statement to pass.

user1150051 Over a year ago

Just changed the if statement to: if ((include '/usr/lib/php/HTTP/OAuth.php') == 'OK') { It still prints the same line: .:/php/includes:/usr/lib/php:/usr/lib/php/PEAR bool(true) INCLUDE FAILED \n

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