How to do a tag system?

PHP
1

Ok, this is a part of PHP that i’ve nevr done before so can someone explain to me how to do a tag system because im building a simple blog script and right now my code is

<div class="form-group"> <label>Tags (max 15, separate with comma):</label> <input class="form-control" name="tags[features]" value="<?php echo $productDetails['tags'];?>" id="coupon-code" type="text"></div>

The php code is

$tags = $_POST['tags'];

but basically i dont know how to do an array as such and then at the end the final result is something like but right now i don’t know how to do it so pleae can someone point me in the right direction / help me achieve a tags system!

FINAL RESULT:
domain.com/tags/???

or something like sitepoint tags system

Thanks

2

If you are wanting an array from the form result you can do this with explode()
Because the user is not inputting an array, but a CSL which comes as a single value, I’m not sure you need the [] in the input name.

$limit = 8;
$raw = explode(',', $_POST['tags'], $limit) ;
$tags = array();
foreach($raw as $tag){ $tags[] = trim($tag) ;}

I used just a comma for the delimiter, then run trim() on each entry, just because you can’t trust users to always use a space or not with the comma.

Though you may want to create a custom function to sanitise the inputs more (Eg, with a preg_replace() to limit allowed characters). In which case you could use array_walk() instead of the slightly cumbersome foreach and do it all in one hit.

Set and use $limit only if you want to limit the number of tags, it is optional.

1 Like
3

I think you are confusing the HTML form’s post and get methods.

Submitting a post method passes a hidden $_POST array to the HTML form’s action page. Setting the form’s method to get passes the input named settings to the command line which is useful for web page tags.

A useful function for displaying variable, arrays, booleans’ strings, etc I frequently use :slight_smile:

function fred( $val ) // easy to type
{
echo '<pre style="width:88%; margin: 2em auto;">';
print_r( $val );
echo '</pre>';
}

// Usage
fred ( $_POST );
fred ( $_GET );
4

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