Web Citizen Magazine

MySQLi OOP connection example PHP

thecitizen — Thu, 05 May 2011 03:10:31 +0000

$mysqli = new mysqli("localhost", "my_user", "my_password", "world"); if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } $query = "SELECT * FROM users WHERE user_id='$userid'"; if ($result = $mysqli->query($query)) { while ($row = $result->fetch_assoc()) { echo $row['name'] ."<br />"; } $result->close(); … Continue reading →

Recursive Functions in PHP (Simple Examples)

thecitizen — Wed, 04 May 2011 01:08:51 +0000

A recursive function is a regular function which calls itself..


// Factorial example (ie 5 * 4 * 3 * 2 * 1)
function factorial($n) {

	if ($n == 1) return 1;
	return $n * factorial($n-1);

}

echo factorial(5); // Outputs 120


// Nested Array Summing Example
$example = array(1, 2, array(10,20,30), 4);

function sum_array($array) {

	$total = 0;
	foreach ($array as $element) {
		if(is_array($element)) {
			$total += sum_array($element);
		} else {
			$total += $element;
		}
	}
	return $total;

}
echo sum_array($example); // Outputs 67

Switch Statement PHP (Simple Example)

thecitizen — Wed, 04 May 2011 00:49:27 +0000


$i = 1;
switch($i) {

 case 0:
 echo 'i equals 0';
 break;

 case 1:
 echo 'i equals 1';
 break;

 default:
 echo 'i equals the default value';

}

Do-While Statement PHP (Simple Example)

thecitizen — Wed, 04 May 2011 00:42:56 +0000

$i = 0;
do { echo $i++; } while ($i <= 10);

While Statement in PHP (Simple Example)

thecitizen — Wed, 04 May 2011 00:38:59 +0000

$i = 0;
while ($i <= 10) {

echo $i++;

}

For Loop vs Foreach Loop in PHP (Simple Example)

thecitizen — Tue, 03 May 2011 11:13:50 +0000

// For Loop for ($i = 1; $i <= 10; $i++) { echo $i; } // Foreach Loop $array = array("sample" => "value", "sample2" => "value2", "sample3" => "value3"); foreach ($array as $key => $val) { echo $key . ': … Continue reading →

WordPress get_the_content function no paragraph tags

thecitizen — Wed, 20 Apr 2011 14:41:33 +0000

Did you just use the WordPress get_the_content function and realize that all of the line breaks from the visual editor are not being returned as paragraph tags?

Solution: Apply the appropriate filters as outlined in the WordPress codex…

', ']]>', $content);

echo $content; ?>

Get current index position in loop in WordPress

thecitizen — Mon, 18 Apr 2011 16:25:14 +0000

Need to get the current index position while iterating through a WordPress loop? Simple… just use $wp_query->current_post

Here’s a very stripped down example loop. Note the output starts at 0 (ie 0, 1, 2, 3…)


current_post;

endwhile;?>

Get image path in child theme in WordPress

thecitizen — Mon, 18 Apr 2011 14:28:22 +0000

To get an image path (or any other file for that matter) inside your child theme in WordPress you can use the get_bloginfo function with the “stylesheet_directory” parameter.


/yourpath/to/an/imagefile.jpg" id="my-new-image" alt="My New Image" />

Remove “comments are closed” from a WordPress theme

thecitizen — Tue, 12 Oct 2010 15:09:48 +0000

On a client’s site, needed to remove “comments are closed” from post/pages where comments have been manually disallowed (by the client on the bottom of the edit screen).

Most blogs say just to remove the call to from your theme, but this removes comments completely. If you just want to remove/edit the message only where comments have been disabled, just find your comments.php file and scan the code for something that looks similar to this…

Comments are closed.

*Note: its likely your code won’t be exactly the same, because each theme may have the comments template setup a little different. The basic idea is to find the “message” that you want to get rid of. In this example, the line we’re looking for is “