PHP implementation Search multi-keyword highlighting program code _php tutorial

Keyword highlighting in PHP is relatively simple to achieve, he only need to obtain the use of the extracted keyword word segmentation and then use the Str_replace () function to implement the replacement can be relatively simple principle.

Project structure:

Start Search: Search for keywords here ("big" "This")

Start Search: Search for keywords here ("big" "This")

Search results: Highlighting

Database structure required for the project:

Database Connection File

The code is as follows	Copy Code
$conn = @ mysql_connect ("localhost", "root", "") or Die ("Database link error"); mysql_select_db ("form", $conn); mysql_query ("Set names ' GBK '"); ?>

To add color to the searchanddisplaywithcolor.php file

}?>

The code is as follows	Copy Code
Include ' conn.php '; ?> cellspacing= "1" bgcolor= "#add3ef" > The keyword is not empty when you perform a related search if ($_get[' KeyWord ']) { Divide the key with a space character $key =explode (', $_get[keyword]); $sql = "SELECT * from the message where title like ' $key [0] ' or title like ' $key [1] ' or content like ' $key [0] ' or content like ' % $key [1]% ']; $query =mysql_query ($sql); while ($row =mysql_fetch_array ($query)) { Replace the keyword and highlight the keyword $row [Title]=preg_replace ("/$key [0]/i", "$key [0]", $row [title]); $row [Title]=preg_replace ("/$key [0]/i", "$key [1]", $row [title]); $row [Content]=preg_replace ("/$key [0]/i", "$key [0]", $row [content]); $row [Content]=preg_replace ("/$key [1]/i", "$key [1]", $row [content]); ?>
Title: User: "> Edit | href= "delete.php?id= " > Delete
Content:
Published date:

Note: In this small program, a little bit of a disadvantage is that only two keywords can be searched at the same time, and the middle with a space "" separated, if you just search a keyword, such as: "Big"
The display will appear garbled ... ^|_|^, this is due to the result of the following code:

Divide the key with a space character

The code is as follows	Copy Code
$key =explode (', $_get[keyword]);

If we want to improve, we should make a judgment in the back of this place.

Summarize

The above keyword highlighting is just a very simple user to submit what we have done on this keyword str_replace to highlight, if you want to do better can use the Dedecms word breaker will be a lot more good.

The implementation method of DEDECMS Word segmentation program can be referenced

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