Peter Kokot petk

Testing for types, empty() and isset() in PHP

Many times you might want to check if some variable has been set and it holds a non-falsy value.

With PHP loose typing:

if (isset($variable) && !empty($variable)) {
    // ...

Habits tracking is a simple and powerful way to track your daily habits to either improve something in your life or to break some destructive habit.

Templates are available for download in different sizes:

	<?php

	$headers = get_headers('http://www.youtube.com/oembed?url=http://www.youtube.com/watch?v=nonexistingid');

	if (!strpos($headers[0], '200')) {
	echo "The YouTube video you entered does not exist";
	}

	<?php

	// this file is inside src folder

	namespace PHPWorldWide;

	use PHPMailer;

	class Mailer
	{

	<form method="post" enctype="multipart/form-data" action="upload.php">
	File: <input type="file" name="file">
	<input type="submit">
	</form>

	<?php

	function getDiff($start, $end)
	{
	$start = explode(':', $start);
	$end = explode(':', $end);

	$start = new DateInterval('PT'.$start[0].'H'.$start[1].'M'.$start[2].'S');
	$end = new DateInterval('PT'.$end[0].'H'.$end[1].'M'.$end[2].'S');

	# https://editorconfig.org/

	root = true

	[*]
	trim_trailing_whitespace = true
	insert_final_newline = true
	indent_style = space
	end_of_line = lf
	indent_size = 4