Question

I have a database which contains the following :

pnid     partnumber       desc       code
====     ==========       ====       ====
1        123-12345        hdd        CMYK

So, the code field contains the pattern of the serial number I am looking for. What I would like to do is that I would like to fetch all the codes from my database, then check if a user input matches the code and display the part number of the matching code.

So saying that my input is ECMYK123456 then the function would return 123-12345.

I am really at lost. All I have is my basic PDO connection.

<?php
function checkPattern($inputString) {
    $dbuser = "root";
    $dbpass = "123456";
    $dbconn = new PDO('mysql:host=localhost;dbname=3parsfdb',$dbuser,$dbpass);  

    $dbconn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $dbconn->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
    $query = $dbconn->query("SELECT * FROM `partnumber` WHERE '%$inputString%' LIKE `ctcode`  LIMIT 1");
    foreach ($query as $row) {
        return $row['partnumber'];
    }
}

echo checkPattern("ECMYK12345");
?>

When I try the function, it returns nothing. What is wrong with the code?

Final Code :

<?php
function checkPattern($inputString) {
    $dbuser = "root";
    $dbpass = "123456";
    $dbconn = new PDO('mysql:host=localhost;dbname=3parsfdb',$dbuser,$dbpass);  

    $dbconn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    $dbconn->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
    $query = $dbconn->query("SELECT * FROM `partnumber` WHERE '$inputString' like concat('%', ctcode, '%') LIMIT 1");
    foreach ($query as $row) {
        return $row['partnumber'];
    }
}

echo checkPattern("ECMYK12345");
?>

Answer 1

Groan:

 SELECT *
 FROM partnumber
 WHERE "ECMYK123456" like concat('%', code, '%')

Note that it can’t use an index on code.