A rainy saturday spent with SQLite

I’d been meaning to get my mits on SQLite for some time and finally found a good project to do so.

Installing SQLite

I’m on ubuntu so the following got things sorted for me:

 sudo apt-get install sqlite3 libsqlite3-dev

1	sudo apt-get install sqlite3 libsqlite3-dev

I then noticed I was getting the following

 PHP Fatal error:  Class 'SQLite3' not found in /var/www/html/wordpress/testdb.php on line 2

1	PHP Fatal error: Class 'SQLite3' not found in /var/www/html/wordpress/testdb.php on line 2

I needed to install the following as per this post and restart my web server

sudo apt-get install php5-sqlite

1	sudo apt-get install php5-sqlite

Check SQLite is installed

php -i|grep sqlite
/etc/php5/cli/conf.d/20-pdo_sqlite.ini,
/etc/php5/cli/conf.d/20-sqlite3.ini,
PDO drivers => mysql, sqlite
pdo_sqlite
sqlite3
sqlite3.extension_dir => no value => no value

php -i|grep sqlite

/etc/php5/cli/conf.d/20-pdo_sqlite.ini,

/etc/php5/cli/conf.d/20-sqlite3.ini,

PDO drivers => mysql, sqlite

pdo_sqlite

sqlite3

sqlite3.extension_dir => no value => no value

Finally, some working php code

While I won’t share my production code with you, here’s what I can share

References: https://www.tutorialspoint.com/sqlite/sqlite_php.htm https://www.digitalocean.com/community/tutorials/how-and-when-to-use-sqlite As per the tutorial above, I created the WINES table and populated it:

CREATE TABLE wines (id integer, producer varchar(30), kind varchar(20), country varchar(20)); 
INSERT INTO WINES VALUES (1, "Rooiberg", "Pinotage", "South Africa");
INSERT INTO WINES VALUES (2, "KWV", "Shiraz", "South Africa");
INSERT INTO WINES VALUES (3, "Marks & Spencer", "Pinot Noir", "France");

CREATE TABLE wines (id integer, producer varchar(30), kind varchar(20), country varchar(20));

INSERT INTO WINES VALUES (1, "Rooiberg", "Pinotage", "South Africa");

INSERT INTO WINES VALUES (2, "KWV", "Shiraz", "South Africa");

INSERT INTO WINES VALUES (3, "Marks & Spencer", "Pinot Noir", "France");

The following code reads my SQLite db ‘test.db’ and outputs the rows from the WINES table to an HTML table.

<?php
   class MyDB extends SQLite3{
      function __construct() {
         $this->open('test.db');
      }
   }
   
   $db = new MyDB();
   if(!$db) {
      echo $db->lastErrorMsg();
   } else {
      echo '<span  class="sdata" style="font-family:Verdana;font-size:12px;font-weight:400;">Opened database successfully</span><br>';
   }

   $sql =<<<EOF
      SELECT * from WINES;
EOF;

   $query = $db->query($sql);
        
// output to table
// css
$css=<<<EOF
 <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head> 
<style>
table.redTable {
  border: 2px solid #A40808;
  background-color: #EEE7DB;
  width: 100%;
  text-align: center;
  border-collapse: collapse;
}
table.redTable td, table.redTable th {
  border: 1px solid #AAAAAA;
  padding: 3px 2px;
}
table.redTable tbody td {
  font-size: 13px;
}
table.redTable tr:nth-child(even) {
  background: #F5C8BF;
}
table.redTable thead {
  background: #A40808;
}
table.redTable thead th {
  font-size: 19px;
  font-weight: bold;
  color: #FFFFFF;
  text-align: center;
  border-left: 2px solid #A40808;
}
table.redTable thead th:first-child {
  border-left: none;
}

table.redTable tfoot {
  font-size: 13px;
  font-weight: bold;
  color: #FFFFFF;
  background: #A40808;
}
table.redTable tfoot td {
  font-size: 13px;
}
table.redTable tfoot .links {
  text-align: right;
}
table.redTable tfoot .links a{
  display: inline-block;
  background: #FFFFFF;
  color: #A40808;
  padding: 2px 8px;
  border-radius: 5px;
}
</style>
EOF;

echo $css;

$firstRow = true;
echo '<div class="table-responsive"><table id="wines_tbl" class="redtable">';
while ($row = $query->fetchArray(SQLITE3_ASSOC)) {
    if ($firstRow) {
        echo '<thead><tr>';
        foreach ($row as $key => $value) {
            echo '<th>'.$key.'</th>';
        }
        echo '</tr></thead>';
        echo '<tbody>';
        $firstRow = false;
    }

    echo '<tr>';
    foreach ($row as $value) {
        echo '<td>'.$value.'</td>';
    }
    echo '</tr>';
}
echo '</tbody>';
echo '</table></div>';

   echo '<span  class="sdata" style="font-family:Verdana;font-size:12px;font-weight:400;">Operation completed successfully</span><br>';
   $db->close();
   
$js=<<<EOF
<script type="text/javascript">
   // jQuery - load jsontable
	  jQuery.getScript("/wordpress/js/jquery.jsontable.js", function() {
	    // script is now loaded and executed ; put your dependent JS here.
	    var jsonData = jQuery("#wines_tbl").tableToJSON({
	    ignoreColumns: [0]
	    }); 
	    
	     console.log(jsonData);
	  });
</script>
EOF;
echo $js;
   
$html.='<hr style="width:100%;">';
$date = time();
$html.='<span  class="sdata" style="font-family:Verdana;font-size:12px;font-weight:600;">Query execution time:</span><br>';
$html.='<span  class="sdata" style="font-family:Verdana;font-size:12px;">'.date("Y-m-d",$date).' '.date( "H:i:s e",$date).'</span><br>';
$date = new DateTime('now');
$tz = new DateTimeZone('Asia/Bangkok');
$date->setTimezone($tz);
$html.= '<span  class="sdata" style="font-family:Verdana;font-size:12px;">Bangkok: '.$date->format('l F j Y g:i:s A')."</span><br>";
$tz = new DateTimeZone("America/Vancouver"); 
$date->setTimezone($tz);
$html.= '<span  class="sdata" style="font-family:Verdana;font-size:12px;">Vancouver: '.$date->format('l F j Y g:i:s A')."</span><br>";
$html .='</body></html>';

echo $html;
?>

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<?php

class MyDB extends SQLite3{

function __construct() {

$this->open('test.db');

}

$db = new MyDB();

if(!$db) {

echo $db->lastErrorMsg();

} else {

echo '<span class="sdata" style="font-family:Verdana;font-size:12px;font-weight:400;">Opened database successfully</span><br>';

}

$sql =<<<EOF

SELECT * from WINES;

EOF;

$query = $db->query($sql);

// output to table

// css

$css=<<<EOF

<!DOCTYPE html>

<head>

</head>

<style>

table.redTable {

border: 2px solid #A40808;

background-color: #EEE7DB;

width: 100%;

text-align: center;

border-collapse: collapse;

}

table.redTable td, table.redTable th {

border: 1px solid #AAAAAA;

padding: 3px 2px;

}

table.redTable tbody td {

font-size: 13px;

}

table.redTable tr:nth-child(even) {

background: #F5C8BF;

}

table.redTable thead {

background: #A40808;

}

table.redTable thead th {

font-size: 19px;

font-weight: bold;

color: #FFFFFF;

text-align: center;

border-left: 2px solid #A40808;

}

table.redTable thead th:first-child {

border-left: none;

}

table.redTable tfoot {

font-size: 13px;

font-weight: bold;

color: #FFFFFF;

background: #A40808;

}

table.redTable tfoot td {

font-size: 13px;

}

table.redTable tfoot .links {

text-align: right;

}

table.redTable tfoot .links a{

display: inline-block;

background: #FFFFFF;

color: #A40808;

padding: 2px 8px;

border-radius: 5px;

}

</style>

EOF;

echo $css;

$firstRow = true;

echo '<div class="table-responsive"><table id="wines_tbl" class="redtable">';

while ($row = $query->fetchArray(SQLITE3_ASSOC)) {

if ($firstRow) {

echo '<thead><tr>';

foreach ($row as $key => $value) {

echo '<th>'.$key.'</th>';

}

echo '</tr></thead>';

echo '<tbody>';

$firstRow = false;

}

echo '<tr>';

foreach ($row as $value) {

echo '<td>'.$value.'</td>';

}

echo '</tr>';

}

echo '</tbody>';

echo '</table></div>';

echo '<span class="sdata" style="font-family:Verdana;font-size:12px;font-weight:400;">Operation completed successfully</span><br>';

$db->close();

$js=<<<EOF

// jQuery - load jsontable

jQuery.getScript("/wordpress/js/jquery.jsontable.js", function() {

// script is now loaded and executed ; put your dependent JS here.

var jsonData = jQuery("#wines_tbl").tableToJSON({

ignoreColumns: [0]

});

console.log(jsonData);

});

</script>

EOF;

echo $js;

$html.='<hr style="width:100%;">';

$date = time();

$html.='<span class="sdata" style="font-family:Verdana;font-size:12px;font-weight:600;">Query execution time:</span><br>';

$html.='<span class="sdata" style="font-family:Verdana;font-size:12px;">'.date("Y-m-d",$date).' '.date( "H:i:s e",$date).'</span><br>';

$date = new DateTime('now');

$tz = new DateTimeZone('Asia/Bangkok');

$date->setTimezone($tz);

$html.= '<span class="sdata" style="font-family:Verdana;font-size:12px;">Bangkok: '.$date->format('l F j Y g:i:s A')."</span><br>";

$tz = new DateTimeZone("America/Vancouver");

$date->setTimezone($tz);

$html.= '<span class="sdata" style="font-family:Verdana;font-size:12px;">Vancouver: '.$date->format('l F j Y g:i:s A')."</span><br>";

$html .='</body></html>';

echo $html;

Here;s what my output looks like:

I grabbed the CSS for the table styling from here.

Backing up your SQLite database

sqlite3 test.db ".backup mysq3db.bak"

1	sqlite3 test.db ".backup mysq3db.bak"

JSON REST API Issues with WordPress Gutenberg

While writing up this post I ran into JSON REST API issues. This post from StackOverflow eventually saved me 🙂

here’s my .htaccess file:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1
</IfModule>
# END WordPress

<Directory "/home/*/Sites">
    AllowOverride All FileInfo AuthConfig Limit Indexes
    Options MultiViews Indexes SymLinksIfOwnerMatch IncludesNoExec
    Require method GET POST PUT DELETE OPTIONS
</Directory>