Dir-Content to array - exclude files with specific pattern - php

Question

I would like to collect all files in a specific directory (at the moment I'm using scandir) - but only those, who do not have a special pattern.
Example:
someimage.png
someimage-150x150.png
someimage-233x333.png
someotherimage.png
someotherimage-760x543.png
someotherimage-150x50.png
In this case I would like to get someimage.png and someotherimage.png as result in my array.
How can I solve this?

Answer 1

To get array of filenames consisting of letters only, you can use this:
$array = array();
$handle = opendir($directory);
while ($file = readdir($handle)) {
if(preg_match('/^[A-Za-z]+\.png$/',$file)){
$array[] = $file;
}
}

Answer 2

The OOP way could be to use a DirectoryIterator in combination with a FilterIterator:
class FilenameFilter extends FilterIterator {
protected $filePattern;
public function __construct(Iterator $iterator , $pattern) {
parent::__construct($iterator);
$this->filePattern = $pattern;
}
public function accept() {
$currentFile = $this->current();
return (1 === preg_match($this->filePattern, $currentFile));
}
}
Usage:
$myFilter = new FilenameFilter(new DirectoryIterator('path/to/your/files'), '/^[a-z-_]*\.(png|PNG|jpg|JPG)$/i');
foreach ($myFilter as $filteredFile) {
// Only files which match your specified pattern should appear here
var_dump($filteredFile);
}
It's just an idea and the code is not tested but. Hope that helps;

Answer 3

$files = array(
"someimage.png",
"someimage-150x150.png",
"someimage-233x333.png",
"someotherimage.png",
"someotherimage-760x543.png",
"someotherimage-150x50.png",
);
foreach ( $files as $key => $value ) {
if ( preg_match( '#\-[0-9]+x[0-9]+\.(png|jpe?g|gif)$#', $value ) ) {
unset( $files[$key] );
}
}
echo '<xmp>' . print_r( $files, 1 ) . '</xmp>';

Answer 4

This regex will fill $correctFiles with all png images that don't contain dimensions (42x42 for example) in their names.
<?php
// here you get the files with scandir, or any method you want
$files = array(
'someimage.png',
'someimage-150x150.png',
'someimage-233x333.png',
'someotherimage.png',
'someotherimage-760x543.png',
'someotherimage-150x50.png'
);
$correctFiles = array(); // This will contain the correct file names
foreach ($files as $file)
if (!preg_match('/^.*-\d+x\d+\.png$/', $file)) // If the file doesn't have "NUMBERxNUMBER" in their name
$correctFiles[] = $file;
print_r($correctFiles); // Here you can do what you want with those files
If you don't want to store the names in an array (faster, less memory consumption), you can use the code below.
<?php
// here you get the files with scandir, or any method you want
$files = array(
'someimage.png',
'someimage-150x150.png',
'someimage-233x333.png',
'someotherimage.png',
'someotherimage-760x543.png',
'someotherimage-150x50.png'
);
foreach ($files as $file)
if (!preg_match('/^.*-\d+x\d+\.png$/', $file)) // If the file doesn't have "NUMBERxNUMBER" in their name
{
print_r($file); // Here you can do what you want with this file
}