MySQL/PHP Multilanguage form - php

Question

How can I build multilanguage form with Translations from database using pdo object?
for example, there is my code to create pdo object:
try {
$pdo = new PDO("mysql:host=$servername;dbname=$dbname",$username, $password);
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
echo $e->getMEssage();
die();
}
$sql = "SELECT FROM `lang_content` `id`, `:lang`";
$query = $pdo->prepare($sql);
if($query->execute(array(
':lang' => $_GET['lang'].'_content'
))){
// Show content
}
MySQL table structure:
CREATE TABLE `lang_content` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`en_content` VARCHAR(1000) NULL DEFAULT NULL,
`lv_content` VARCHAR(1000) NULL DEFAULT NULL,
`ru_content` VARCHAR(1000) NULL DEFAULT NULL,
PRIMARY KEY (`id`)
)
COMMENT='All translations'
ENGINE=MyISAM
;
MySQL table data example:
id en_content lv_content ru_content
1 MOD KASKO КАСКО
2 MTPL OCTA ОСАГО
And I would like to use it like:
if lang en
<?= $result->1 ?> // Echo MOD
Will return MOD,
<?= $result->2 ?> // Echo MTPL
Will return MTPL

Answer 1

Honestly that is not good practice to do your translation via database. Many big platforms do it through some sort of text format. For example magento does it through csv files.
You could start your development with the following code.
Your Spanish translation file es.csv
'Home', 'Inicio'
'Page 1', 'Pagina 1'
'Page 2', 'Pagina 2'
'Page 3', 'Pagina 3'
The first column of words would be your default language which would be defined within a function.
<a href="#"><?php __("Home"); ?>
Then you would use a switch statement like the one you have on top to capture which language the user choose. The __() function would look something like this. Where input would be "home"
$csv = array_map('str_getcsv', file($file));
// Logic (where it would do the translation)
// It could look for the input in the $cvs variable if it exist then use the next value of the current array. Else keep the text the same.
Your cvs file would need to make the exact words to be translated.