Debugging PHP made easy
At some point in our life as PHP developer, we come to the point where we are debugging PHP by controlling the values of out variables, arrays and objects.
This is a problem for PHP debug.
You can echo() in your code, but thats not always possible.
Sometimes your layout will break, or when doing AJAX calls you might not even see anything.
So how can you see your precious variables, objects and SQL commands at runtime without breaking the app?
A way to debug some values is writing them to a file.
$myVariable = "Hey, Mr. Coder!";
$myArray = ['color' => 'green','feet' => 'big','dog' => 'Retriever'];
$debugfile = fopen("debug.txt", "w");
You should notice the “w” in the fopen command. This is called the “mode”. Mode “w” means your file will always be cleared when writing to it.
If you dont want that, but rather keep all records in the file, you should use mode “a”:
$debugfile = fopen("debug.txt", "a");
Do you see the “\n” in the first fwrite command? This writes a newline to the file. Otherwise the following array would be written to the same line as the variable and the whole debug output would be hardly readable.
For a list of all modes and more examples you should head over to http://php.net/manual/de/function.fopen.php.
With this snippet you can show a static google map image for a specific location, which is linked to google maps and includes showing a marker in all views.
Don’t forget to change YOUR_GOOGLE_STATIC_MAPS_API_KEY to your api key, which you can get at https://console.developers.google.com by creating a server key and aactivate google maps for this account.
$address = urlencode("Kupferbergterrasse 10, 55116 Mainz");
$request = file_get_contents("https://maps.google.com/maps/api/geocode/json?address=" . $address . "&key=YOUR_GOOGLE_STATIC_MAPS_API_KEY&sensor=false", false, stream_context_create($arrContextOptions));
$json = json_decode($request, true);
$lat = $json['results']['geometry']['location']['lat'];
$lng = $json['results']['geometry']['location']['lng'];
$marker = "color:blue|label:ZIEL|".$lat.','.$lng;
echo '<a href="https://www.google.com/maps/place/'.$address.'"><img src="https://maps.googleapis.com/maps/api/staticmap?center='.$lat.','.$lng.'&zoom=14&size=600x300&markers='.$marker.'&key=YOUR_GOOGLE_STATIC_MAPS_API_KEY"></a>';
Task: Create a slider from the entries of an an XML-File.
Design draft is here: http://pascha.org/aufgabe/slider.png
XML-File is here: http://pascha.org/aufgabe/comments.xml
Icons & Elements: http://pascha.org/aufgabe/pascha.org-aufgabe-icons.zip
– You can use jQuery
– The entries in the XML are pointing to facebook or google, so the respective logo should be shown in the slider.
– The Slider should jump from the last to the first entry.
The slider should be draggable and use touchevents.
– The “Read more”-Button (“weiterlesen”) should be linked to the respective page.
To show the content of a directory in PHP and make the files like images etc downloadable without changing the Webserver config, upload this snippet as index.php to the directory.
To scroll smoothly to an anchor on your webpage with jQuery, you can use following snippet:
anchor = $(this).attr('href');
If you want to move elements around the screen in multiple steps, you can use CSS animations for that.
If you want to move an element to a screen corner with CSS only, theres a simple Solution with CSS3.
Small Dropdown snippet:
with jQuery, all you need are just 3 lines of js and you have created a dropdown:
A 2 (or multiple) row responsive fluid layout, one row has fixed width, all rows have same height, a margin is between rows.
It collapses in mobile resolutions.
The code is minimal, no freaky negative margins or paddings. Everybody should be able to use it.
Fluid width row
Your bones don’t break, mine do. That’s clear. Your cells react to bacteria and viruses differently than mine. You don’t get sick, I do. That’s also clear. But for some reason, you and I react the exact same way to water. We swallow it too fast, we choke. We get some in our lungs, we drown. However unreal it may seem, we are connected, you and I. We’re on the same curve, just on opposite ends.
(Text by http://slipsum.com)
Fixed width row
Change browser width to see it respond.