PHP Directory iterator recursivedirectoryiterator How to improve efficiency

PHP Directory iterator recursivedirectoryiterator How to improve efficiency
Iterator mode
Echo ' program start: '. Time (). '
';
$path = ' d:/www ';
Getrevdir ($path);
Echo ' program end: '. Time (). '
';
Exit
Echo '

';
Get all directories and filenames under the current path
This usage is mainly used in the B/s program to obtain the remote server directory
Var_dump (Array_keys (Iterator_to_array (New Recursivedirectoryiterator ($path)));
Exit

Iterate to get all directories and files under the current path
function Getrevdir ($path, $level = 0) {
$dirIterator = new Recursivedirectoryiterator ($path);
$strSplitBar = ";
for ($i =0; $i < $level; $i + +) {
if ($i = = $level-1) {
$strSplitBar. = ' |__ ';
}else{
$strSplitBar. = ';
}
}
foreach ($dirIterator as $key = = $fileInfo) {
if ($dirIterator->haschildren ()) {
$dirName = substr ($key, Strrpos ($key, Directory_separator) +1);
Echo $strSplitBar. $dirName. '
';
Getrevdir ($key, $level + 1);
}else{
Echo $strSplitBar. basename ($key). '
';
}
}
}
Execution results
Program Start time: 1402624676
Program End time: 1402624682

Opendir Way

 Echo ' program start: '. Time (). '
';
$path = ' d:/www ';
Getrevdir ($path);
Echo ' program end: '. Time (). '
';
Exit
Echo '
//Get all directories and filenames under current path 
//This usage is mainly used in the B/s program to obtain the remote server directory 
 Var_dump (Array_keys (Iterator_to_array (new Recursivedirectoryiterator ($path)))); 
 Exit; 
 
//iteration gets all directories and files under the current path 
 function Getrevdir ($path, $level = 0) {
 $dirIterator = new Recursivedirectoryiterator ($path); 
 $strSplitBar = '; 
 for ($i =0; $i < $level; $i + +) {
 if ($i = = $level-1) {
 $strSplitBar. = ' |__ '; 
} else{
 $strSplitBar. = '; 
} 
} 
 foreach ($dirIterator as $key = + $fileInfo) {
 if ($dirIterator->haschildren ()) {
 $dirName = substr ( $key, Strrpos ($key, Directory_separator) +1); 
 Echo $strSplitBar. $dirName. ' 
 '; 
 Getrevdir ($key, $level + 1); 
}else{
 Echo $strSplitBar. basename ($key). ' 
 '; 
} 
} 
} 
 
 Execute result 
 program start time: 1402624679 
 Program End time: 1402624682 
 Time difference is great. 
 ------Solution--------------------
 Traverse the entire Web site directory for 3 seconds, quickly 
------solution--------------------
 The efficiency of the traversal is the same. 
 to get the directory tree to be processed without Linux commands. 
 