Searching for a string in a file

[cmjspurs]

Hi, I'm having trouble searching for string in a webpage.

The string I'm searching for is a piece of perl code:
if($number2==0 && $operator eq "/")

The problem seems to be that the quotes in the string need to be formatted, so using the addslashes function the string to be searched becomes:
if($number2==0 && $operator eq \"/\")

However, this string cannot be found either. The webpage I am searching is being read into a variable using the following commands:

$fp_cal = fopen("submitted/cal_source.htm", "r");
$contents = fread($fp_cal, 10000);

I'm wondering if any formatting needs to be done to the $contents variable such as stripslashes? I have experimented with this thought but with no success. I know that the file is being read ok as other searches for simpler strings work.

Thanks in advance for any feedback.

[cmjspurs]

If anyone else has had this problem, I managed to get this working finally, heres an example:

$searcher = 'blahblah'; //string to be searched
$search_zero = htmlspecialchars($searcher);
$zero_found = strpos($contents, $search_zero);

I'm not sure if this is such an effiecent way to to this, but it works.