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Output result from PHP regex search.

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  • 28-09-2009 6:20pm
    #1
    techguy
    Registered Users Posts: 2,234 ✭✭✭


    Hey,

    It's my first attempt at trying to isolate a piece of text from a html string that was scraped with PHPs CURL!

    I have the html and am trying to search for the text in red: 
    <TD><B>Total Downloads to date this month: </B></TD><TD ALIGN=RIGHT>&nbsp;[COLOR="Red"]21892[/COLOR] MB</TD>

    I took this expression from a tutorial site: 
    $html = preg_match("/Total Downloads to date this month: <\/B><\/TD><TD ALIGN=RIGHT>&nbsp;(.*) MB<\/TD>/", $html, $matches);

    The only problem is that I can't print anything from the $matches array.
    $matches[0] is undefined etc etc..

    Any ideas on this? I know I should probably learn about regular expression but they seem to scary tbh!

    Thanks.


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    #2
    daymobrew
    Registered Users Posts: 6,509 ✭✭✭daymobrew


    If your PHP version is 5.2.0 or newer you could use the filter_var function.
    http://www.w3schools.com/PHP/filter_validate_int.asp
    [PHP]$extracted_number = filter_var( $html, FILTER_VALIDATE_INT);[/PHP]
    Or simplify your regular expression to only look for numbers:
    [PHP]$whether_found = preg_match( "/(\d+)/", $html, $matches );
    if ($whether_found) print_r($matches); // This will display the matches, if any.[/PHP]


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