How to traverse directories or folders using glob function in PHP, _PHP tutorial

PHP uses the glob function to traverse directories or folders,

The example in this article describes how PHP uses the glob function to traverse directories or folders. Share it with everyone for your reference. The specific analysis is as follows:

When it comes to traversing directories in PHP, many of our friends will think of opendir and readdir, which can traverse directories and display files. However, there is a more concise function glob in PHP that traverses directories. It is estimated that few people know this function. But I think it’s much simpler than opendir and readdir.

Usage of PHP glob function: glob—find file paths matching the pattern.

Example, the code is as follows:

Copy code The code is as follows:

$fileList=glob('*.*');
for ($i=0; $i echo $fileList[$i].'
';
}
$fileList2=glob('images/*');
for ($i=0; $i echo $fileList2[$i].'
';
}
$fileList3=glob('*');
for ($i=0; $i echo $fileList3[$i].'
';
}
?>

The first one: the parameters of the glob function are: *.*, which means to scan the files in the current directory, excluding folders, and return an array. The following two situations are the same.

The second type: the parameters of the glob function are: images/*, which specifies a directory to scan all files, including folders, and can also scan specified file types, such as: images/*.jpg; note that if only Entering: images will only return the folder name. If you only enter: images/, nothing will be returned.

The third type: the parameters of the glob function are: *, which can scan out all files, directories and subdirectory files in the current directory.

Okay let’s take a look at opendir and readdir traversing directories. The code is as follows:

Copy code The code is as follows:

/************************
A simple directory recursive function
The first implementation method: use dir to return the object
*************************/
function tree($directory)
{
$mydir = dir($directory);
echo "

n";
while($file = $mydir->read())
{
if((is_dir("$directory/$file")) AND ($file!=".") AND ($file!=".."))
{
echo "
• $file
n";
tree("$directory/$file");
}
else
echo "
• $file
n";
}
echo "

n";
$mydir->close();
}
//Start running
echo "

The directory is pink

n";
tree("./nowamagic");
/***********************
The second implementation method: use the readdir() function
************************/
function listDir($dir)
{
if(is_dir($dir))
{
if ($dh = opendir($dir))
{
while (($file = readdir($dh)) !== false)
{
if((is_dir($dir."/".$file)) && $file!="." && $file!="..")
{
echo "File name:",$file,"

---

";
listDir($dir."/".$file."/");
}
else
{
if($file!="." && $file!="..")
{
echo $file."
";
}
}
}
closedir($dh);
}
}
}
//Start running
listDir("./nowamagic");
?>

Okay, everyone has seen how sub-glob, opendir and readdir are written to traverse the input. In terms of code simplicity, glob completely beats opendir and readdir. It achieves the same effect in terms of functional implementation, so it is recommended to use the glob function to traverse the directory. .

I hope this article will be helpful to everyone’s PHP programming design.

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