• dBase
• DB++
• FrontBase
• filePro
• Firebird/InterBase
• Informix
• IBM DB2
• Ingres
• MaxDB
• Mongo
• mSQL
• Mssql
• MySQL
• Mysqli
• Mysqlnd
• OCI8
• Ovrimos SQL
• Paradox
• PostgreSQL
• SQLite
• SQLite3
• Sybase
• tokyo_ tyrant

Some of these methods use the same database type, such as MySQL and Mysqli. However I will only be focusing on the most common methods, which incude MySQL, SQLite, and OBCD.

Most PHP developers use MySQL due to its support, popularity, cross-platform, and universal capabilities. It is not proprietary like Microsoft Access Databases, and it has a really handy tool called PHPMyAdmin.

SQL looks like this

INSERT INTO My_table
(field1, field2, field3)
VALUES
(‘test’, ‘N’, NULL);

In PHP, we can wrap this in double quotes like so

$sql = "INSERT INTO My_table
 (field1, field2, field3)
 VALUES
 ('test', 'N', NULL);";

and then execute it with what ever database method we choose.

MySQL:
mysql_query($sql);
SQLite:
sqlite_query($db,$sql);
OBCD:
odbc_exec($db, $sql);

As I have only had personal experience with two of the above, I will not cover OBCD any more than the above.

Back to MySQL and SQLite:
Both MySQL and SQLite require an initiation at the beginning of each script execution. In MySQL’s case an example would be:

<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
die('Could not connect: ' . mysql_error());
}
echo 'Connected successfully';
mysql_close($link);
?>

<?php
$link = mysql_connect(‘localhost’, ‘USER’, ‘PASS’);
mysql_selectdb(“DB_NAME”);
$name = “TABLE_NAME”;
$sql = “SELECT *
FROM `$name` LIMIT 1″;
$res = mysql_query($sql);
$row = mysql_fetch_array($res);
$cols = mysql_num_fields($res);
$sql = “SELECT *
FROM `$name`”;
$res = mysql_query($sql);
$rowsdone = 0;
if ($db = sqlite_open(‘SQLITE_FILE_LOCATION’, 0666, $sqliteerror)) {
$res = mysql_query($sql);
while($row = mysql_fetch_array($res)){
$sqli = “INSERT INTO $name VALUES(“;
for($x = 0; $x < $cols; $x++){
$sqli .= “‘”.sqlite_escape_string($row[$x]).”‘”;
if($x != $cols -1){
$sqli .= ” , “;
}
}
$sqli .= “);”;
$result = sqlite_query($db,$sqli);
if(sqlite_last_error($db) != 1){
echo sqlite_error_string(sqlite_last_error($db)).”\n”;
//echo strip_tags($sqli);
echo “<br>\n “;
}
}
} else {
die ($sqliteerror);
}
?>

if ($db = sqlite_open(‘SQLITE_FILE_LOCATION’, 0666, $sqliteerror)) {

mysql_selectdb(“DB_NAME_HERE“);

CREATE TABLE `DB_NAME_HERE`.`tablename` (

`id` INT( 8 ) UNSIGNED NOT NULL AUTO_INCREMENT ,
`description` TEXT NOT NULL ,
PRIMARY KEY ( `id` ) ,
INDEX ( `id` )

) ENGINE = MYISAM ;

INSERT INTO `DB_NAME_HERE`.`tablename` (

`id` ,
`description`

)
VALUES (

NULL , ‘Beans do not taste like fruit.’

);

echo mysql_error();

echo sqlite_error_string(sqlite_last_error($db));

$sql = “SELECT  * FROM `TABLE_NAME`”;

$result = mysql_query($sql);

while($row = mysql_fetch_array($result)){

while($row = mysql_fetch_assoc($result)){

while($row = mysql_fetch_array($result)){

print_r($row);

}

UPDATE `DB_NAME`.`tablename` SET `description` = 'Beans do not taste like fruit. Yet they are supposed to be magical...' WHERE `tablename`.`id` =1;