How to separate string into parts in PHP - php

Question

Right Now I Have:
$path2 = $file_list1;
$dir_handle2 = #opendir($path2) or die("Unable to open $path2");
while ($file2 = readdir($dir_handle2)) {
if($file2 == "." || $file2 == ".." || $file2 == "index.php" )
continue;
echo ''.$file2.'<br />';
}
closedir($dir_handle2);
echo '<br />';
When $file2 is returned, the last 4 characters in the string will always end in a number plus the file extension .txt, like this:
file_name_here1.txt
some_other-file10.txt
So my question is, how can I separate $file2 so it returns the string in two parts, $file_name and $call_number like this?:
echo 'File: '.$file_name.' Call: '.call_number.'<br />';
Returns:
File: file_name_here Call: 1
File: some_other-file Call: 10
instead of this:
echo ''.$file2.'<br />';
Returns:
file_name_here1.txt
some_other-file10.txt
Thanks....

Answer 1

I'm a big advocate of Regex but I decided to go slightly different here. Check it out:
$file = 'file_name_here19.txt';
$file_parts = pathinfo($file);
$name = $file_parts['filename'];
$call = '';
$char = substr($name, strlen($name) - 1);
while(ord($char) >= 48 && ord($char) <= 57) {
$call = $char . $call;
$name = substr($name, 0, strlen($name) - 1);
$char = substr($name, strlen($name) - 1);
}
echo 'Name: ' . $name . ' Call: ' . $call;

Answer 2

Use regular expressions:
preg_match("/^(.+)(\d+)(\..+)$/", $file2, $matches);
$file_name = $matches[1];
$call_number = $matches[2];

Answer 3

Try this, you need to use Regex to do this effectively
$filename = reset(explode(".", $file2))
preg_match("#(^[a-zA-Z\_\-]*)([\d]*)#", $filename, $matches);
$fullMatch = $matches[0];
$file = $matches[1];
$call = $matches[2];
echo "File: " . $file . " Call: " . $call;

Answer 4

Use pathinfo() function to cut off file extension.
Use preg_match() function to separate name from number.
3.
while (...) {
...
$filename; // some_other-file10.txt
$filename = pathinfo($filename, PATHINFO_FILENAME); // some_other-file10
preg_match('/^(?<name>.*?)(?<number>\d+)$/', $filename, $match);
$match['name']; // some_other-file
$match['number']; // 10
echo "File: {$match['name']} Call: {$match['number']}\n";
}