PHP using a custom function to traverse all files in the directory _php tips

Directory traversal is a PHP design often used in a function, many PHP projects have this function module. Today in this article to illustrate the example of PHP using a custom function to traverse all the files in the directory method. The specific methods are as follows:

Method One: Use Readir () to traverse the directory

The implementation code is as follows:

function Listdir ($dir)
{
  if (Is_dir ($dir))
  {
    if ($handle = Opendir ($dir))
    {while
      ($file = Readdir ($handle))
      {
        if ($file!= '. ' && $file!= ' ... ')
        {
          if (Is_dir, $dir. Directory_separator. $file))
          {
            echo ' directory name: '. $dir. Directory_separator. ' <font color= "Red" > '. $file. ' </font><br/> ';
            Listdir ($dir. Directory_separator. $file);
          else{
            echo ' filename: '. $dir. Directory_separator. $file. ' <br/> ';
          }
    }}} Closedir ($handle);
  else{
    Echo ' is not a valid directory! '}
}
Listdir ('./phpmyadmin '); 

Method Two: Use Dir () to traverse the directory

This example uses the Dir () function traversal to return a directory class instance when the execution succeeds

function tree ($dir)
{
  $mydir = dir ($dir);
  while ($file = $mydir->read ())
  {
    if ($file!= '. ' && $file!= ' ... ')
    {
      if (Is_dir ("$dir/$file"))
      {
        echo ' directory name: '. $dir. Directory_separator. ' <font color= "Red" > '. $file. ' </font><br/> ';
        Tree ("$dir/$file");
      else{
        echo ' filename: '. $dir. Directory_separator. $file. ' <br/> ';
      }
  }} $mydir->close ();
}
Tree ('./phpmyadmin ');

In addition, there are many ways to achieve directory traversal, I believe the method described in this article can give you some help in PHP program design.