The opendir() function in PHP is an inbuilt function which is used to open a directory handle. The path of the directory to be opened is sent as a parameter to the opendir() function and it returns a directory handle resource on success, or FALSE on failure.
The opendir() function is used to open up a directory handle to be used in subsequent with other directory functions such as closedir(), readdir(), and rewinddir().
Syntax:
opendir($path, $context)
Parameters Used: The opendir() function in PHP accepts two parameters.
- $path : It is a mandatory parameter which specifies the path of the directory to be opened.
- $context : It is an optional parameter which specifies the behavior of the stream.
Return Value: It returns a directory handle resource on success, or FALSE on failure.
Errors And Exceptions:
- A PHP error of level E_WARNING is generated and opendir() returns FALSE if the path is not a valid directory or the directory cannot be opened due to permission restrictions or filesystem errors.
- The error output of opendir() can be suppressed by prepending ‘@’ to the front of the function name.
Below programs illustrate the opendir() function:
Program 1:
<?php   // Opening a directory $dir_handle = opendir("/user/gfg/docs/");   if(is_resource($dir_handle)) {     echo("Directory Opened Successfully."); }   // closing the directory closedir($dir_handle);   else{     echo("Directory Cannot Be Opened."); }   ?> |
Output:
Directory Opened Successfully.
Program 2:
<?php   // opening a directory and reading its contents $dir_handle = opendir("user/gfg/sample.docx");   if(is_resource($dir_handle)) {     while(($file_name = readdir($dir_handle)) == true)     {         echo("File Name: " . $file_Name);         echo "<br>" ;     }       // closing the directory     closedir($dir_handle); } else{ echo("Directory Cannot Be Opened."); } ?> |
Output:
File Name: sample.docx
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