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Keyword highlight help

Thread began 3/15/2012 8:37 am by info364504 | Last modified 3/15/2012 12:02 pm by info364504 | 414 views | 2 replies

Jason ByrnesWebAssist

it _can_ be done, but is not supported and requires some hand coding to accomplish.

one way it could be done would be to store the search terms in a session variable, then using the php preg_replace() function, search the rescordset results for the string, and replace with a span tag using the color style



the following code is an example of how this can be done, in this example the search forms method was set to POST.

the first block sets session variables for each POST element using the name "['searchTerms']['<elementName>']". so if I have a form element named "name", the value of the name form element will be stored in a session named "['searchTerms']['name']"

the second block is a function to do the highlighting, it takes 2 arguments, the name of the element and the data to search.

php:
<?php
@session_start();
if(
$_SERVER['REQUEST_METHOD'] == "POST") {
    if(isset(
$_SESSION['searchTerms'])) unset($_SESSION['searchTerms']);
    foreach(
$_POST as $k => $v) {
        if(
$v != "") {
            
$_SESSION['searchTerms'][$k] = $v;
        }
    }
}

function 
doHighLight($elemName$haystack) {
    if(isset(
$_SESSION['searchTerms'][$elemName]) && $_SESSION['searchTerms'][$elemName] != "") {
        
$termsArr explode(" "$_SESSION['searchTerms'][$elemName]);
        
$needleArr = array();
        for(
$i=0;$isizeof($termsArr) ; $i++) {
            
$needleArr[] = "{".$termsArr[$i]."\b}i";
        }        

        
$retstr "";
        
$retstr preg_replace($needleArr"<span style=\"color:red;\">$0</span>"$haystack);
        return 
$retstr;
    } else {
        return 
$haystack;
    }
}
?>



in the results page, the code to display a recordset column may look like this:

php:
<?php echo $row_recordsetName['ProductName']); ?>



we can change this to perform the highlighting by adding the doHighLight function call around it.

in my example,, the name of the form element that searches the "ProductName" column is "name", so the doHighLight function call will look like this:

php:
<?php echo doHighLight("name"$row_recordsetName['ProductName']); ?>




like i said, this is not supported functionality, but with some familiarity with PHP coding, you should be able to use the example as a starting point.

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