popen vs. opendir/readdir

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June 5th, 2002, 08:48 PM

Winds

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popen vs. opendir/readdir

Hi all!

I wonder if there is any difference when it comes to performance(or anything else..) with these two methods of getting a directory listing:

With popen:

PHP Code:


		
			
 $dp = popen ("/bin/ls", "r"); 



$buffer = fgets($dp, 4096);

while (!feof ($dp)) {

   echo $buffer, "<br>";

   $buffer = fgets($fp, 4096);

}

pclose($dp);

With opendir & readdir

PHP Code:


		
			
 $dp = opendir("path/to/directory/); 

while($direntry = readdir($dp)) { 

   echo $direntry, "<br>";

}

closedir($dp);

Is there a better way of doing this? Please let me know.

-Winds-

June 6th, 2002, 03:57 PM

epyon

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Join Date: May 2002

Location: Chicago

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i do this:

PHP Code:


		
			
print `dir $directory`;

the ` (tilde) is enterpreted as a system command.

Last edited by epyon : June 6th, 2002 at 04:00 PM.

June 6th, 2002, 06:10 PM

mytch

Join Date: Apr 2002

Location: Sydney, Australia

Posts: 589

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Well opendir is a native PHP function for opening a directory and popen opens a process file pointer with the use of pipes and forking, so my bet you be that opendir is heaps quicker.

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