PHP - Add Script - php

Question

I'm quite new with PHP and need help coding an add script for my web site. I have coded the delete and update side and they are working perfectly. Basically, on secdtions of my web site you can add values to several text boxes and what I want is that when you click on 'Add' this will add the details from the textboxes to the database. To do this I am using PHP, Jquery and Ajax.
This is the code I have for the update script:
public function update($tableName,$fieldArray,$fieldValues,$rowId,$updateCondition)
{
// Get PDO handle
$PDO = new SQL();
$dbh = $PDO->connect(Database::$serverIP, Database::$serverPort, Database::$dbName, Database::$user, Database::$pass);
// Build query
$this->sql = 'UPDATE '.$tableName.' SET ';
$fieldCount = count($fieldArray);
for ($i = 0; $i < $fieldCount; $i++){
// If the index is at the last field...
$lastRow = $fieldCount - 1;
if ($i != $lastRow) {
// Add a comma
$this->sql .= $fieldArray[$i].'=:'.$fieldArray[$i].', ';
} else {
// Dont add a comma
$this->sql .= $fieldArray[$i].'=:'.$fieldArray[$i].' ';
}
}
// If row id is null (if we don't know the row id)...
if ($rowId == null || $rowId == "null") {
// Then use the update condition in it's place
$this->sql .= 'WHERE '.$updateCondition.' ';
} else {
// Use the ID
$this->sql .= 'WHERE Id = '.$rowId.' ';
}
try {
// Query
$stmt = $dbh->prepare($this->sql);
// Bind parameters
for ($i = 0; $i < $fieldCount; $i++){
$stmt->bindParam(':'.$fieldArray[$i].'', $fieldValues[$i]);
}
$stmt->execute();
$count = $stmt->rowCount();
echo $count.' row(s) affected by SQL: '.$stmt->queryString;
$stmt->closeCursor();
}
catch (PDOException $pe) {
echo 'Error: ' .$pe->getMessage(). 'SQL: '.$stmt->queryString;
die();
}
// Close connection
$dbh = null;
}
This is the part I am struggling to code, if you look at the code I have used for my update script.. I basically need something similiar to use for my 'add' script.
Any help will be much appreciated!!

Answer 1

Welcome to PHP! It is really a wonderful language :)
Try this:
<?php
public function insert($tableName,$fieldArray,$fieldValues)
{
$sql = "INSERT INTO " . $tableName . " (".implode(',', $fieldArray).") VALUES (".implode(',', $fieldValues).")";
// TODO: Execute $sql query
}

Answer 2

You should basically write out your functions and then at the end print out the resulting SQL statements it creates. Once you're able to see them from that level, you can try them in a query browser to see if you're constructing them correctly.