PHP: array_flip() function
The array_flip() function is used to exchange the keys with their associated values in an array.
The function returns an array in flip order, i.e. keys from array become values and values from array become keys.
Note: The values of the array need to be valid keys, i.e. they need to be either integer or string. A warning will be emitted if a value has the wrong type, and the key-value pair in question will not be included in the result.
(PHP 4 and above)
|array_name||The given array.||Required||Array|
The flipped array on success and FALSE on failure.
Value Type: Array
<?php $a=array("Orange" => 100, "Apple" => 200, "Banana" => 300, "Cherry" => 400); $b=array_flip($a); print_r($b); ?>
Array ( => Orange  => Apple  => Banana  => Cherry )
Practice here online :
PHP: Tips of the Day
Convert HTML + CSS to PDF
Important: Please note that this answer was written in 2009 and it might not be the most cost-effective solution today in 2019. Online alternatives are better today at this than they were back then.
Here are some online services that you can use:
- PDF Layer
- HTML to PDF Rocket
Have a look at PrinceXML.
It's definitely the best HTML/CSS to PDF converter out there, although it's not free (But hey, your programming might not be free either, so if it saves you 10 hours of work, you're home free (since youalso need to take into account that the alternative solutions will require you to setup a dedicated server with the right software).
Ref : https://bit.ly/384yytr
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