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PHP Quiz PHP CertificatePHP opendir() Function
Complete PHP Directory Reference
Definition and Usage
The opendir() function opens a directory handle to be used by the closedir(), readdir(), and rewinddir() functions.
This function returns a directory stream on success and FALSE and an error on failure. You can hide the error output by adding an '@' in front of the function name.
Syntax
opendir(directory,context)
| Parameter | Description |
|---|---|
| directory | Required. Specifies the directory to stream |
| context | Optional. Specifies the context of the directory handle. Context is a set of options that can modify the behavior of a stream |
Tips and Notes
Note: From PHP 5 the directory parameter supports the ftp:// URL wrapper.
Example 1
<?php
//Open images directory
$dir = opendir("images");
//List files in images directory
while (($file = readdir($dir)) !== false)
{
echo "filename: " . $file . "<br />";
}
closedir($dir);
?>
//Open images directory
$dir = opendir("images");
//List files in images directory
while (($file = readdir($dir)) !== false)
{
echo "filename: " . $file . "<br />";
}
closedir($dir);
?>
The output of the code above could be:
filename: .
filename: ..
filename: cat.gif
filename: dog.gif
filename: food
filename: horse.gif
filename: ..
filename: cat.gif
filename: dog.gif
filename: food
filename: horse.gif
Example 2
This example hides the error if opendir() fails:
<?php
//Open images directory
$dir = @ opendir("images");
//List files in images directory
while (($file = readdir($dir)) !== false)
{
echo "filename: " . $file . "<br />";
}
closedir($dir);
?>
//Open images directory
$dir = @ opendir("images");
//List files in images directory
while (($file = readdir($dir)) !== false)
{
echo "filename: " . $file . "<br />";
}
closedir($dir);
?>
The output of the code above could be:
filename: .
filename: ..
filename: cat.gif
filename: dog.gif
filename: food
filename: horse.gif
filename: ..
filename: cat.gif
filename: dog.gif
filename: food
filename: horse.gif
Complete PHP Directory Reference
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