在内部的Php - 这段代码有什么问题？

This code is to read contents of a text file that contains 100 urls one in each line. The script is to search for a particular word in the urls using file_get_contents.

<?php  
$mysearch = file("phpelist.txt");  

for($index = 0; $index <count($mysearch); $index++)  
{  while ($index >=10 && $index <=20 ):

    $mysearch[$index] = str_replace("
", "", $mysearch[$index]);  
    $data = file_get_contents("$mysearch[$index]");  

    $searchTerm = 'about';  

    if (stripos($data, $searchTerm) !== false) {
        echo "$mysearch[$index]</strong>...FOUND WORD<br><strong>";  
    } 
    else 
    {  
        echo "$mysearch[$index]</strong>...NO SUCH WORD<br><strong>";  
    }  
 endwhile;
} 

?>

Your code confused me. Looking at just the requirements statement, I got ...

$searchTerm = 'about';
$file = new SplFileObject('phpelist.txt');
foreach ($file as $n => $url) {
    if ($n < 10) continue;
    if ($n > 20) break;

    $content = file_get_contents($url);
    if (stripos($content, $searchTerm) !== false) {
        echo "<strong>$url</strong>...FOUND WORD<br>";
    } else {
        echo "<strong>$url</strong>...NO SUCH WORD<br>";
    }
}

CORRECTED: Additional requirements (see comments below). Which means its no longer much short than OP. The only thing it adds, I guess, is the use of SplFileObject. I like using SplFileObject because it lets you use a file like an array (without loading the entire file into memory) and so can be used in a foreach (since SplFileObject implements the Iterator interface).