Php array key value swap

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By understanding and implementing this function, you can increase the efficiency of your code and reduce the time spent on manual data manipulation. This can be useful in many scenarios, such as when you need to find the key for a specific value, or when you want to reorganize your data for more efficient processing. As you can see, the function takes one parameter, the input array, and returns a new array with the keys and values flipped. Here's an array of fruit names with their corresponding colors as keys:. As you can see, the keys and values have been flipped, and the fruit names are now the keys, with their colors as values. This is because array keys must be unique. Let's look at an example:.

Php array key value swap

If a key from the first array exists in the second array, its value will be replaced by the value from the second array. If the key exists in the second array, and not the first, it will be created in the first array. If a key only exists in the first array, it will be left as is. If several arrays are passed for replacement, they will be processed in order, the later arrays overwriting the previous values. Arrays from which elements will be extracted. Values from later arrays overwrite the previous values. Returns an array. Submit a Pull Request Report a Bug. Parameters array The array in which elements are replaced. Return Values Returns an array. Simple function to replace array keys. Note you have to manually select wether existing keys will be overrided. To get exactly same result like in PHP 5. Assuming that you have a limitation to display the content into given keys order, i. I got hit with a noob mistake.

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This article demonstrates a PHP function which can be used for swapping of keys with values in an array. This function returns an array with flipped values. Firefox and Microsoft Internet Explorer are recommended browsers for websites using java applets. All rights reserved. Ask Tech Query Post Blogs. Nerd Digest Users.

Php array key value swap

If a key from the first array exists in the second array, its value will be replaced by the value from the second array. If the key exists in the second array, and not the first, it will be created in the first array. If a key only exists in the first array, it will be left as is.

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Submit a Pull Request Report a Bug. W3Schools is Powered by W3. Last Updated : 20 Jun, How to get the function name inside a function in PHP? This built-in function of PHP is used to exchange elements within an array, i. While using W3Schools, you agree to have read and accepted our terms of use , cookie and privacy policy. It takes a value, gets all keys for that value if it has duplicates, unsets them all, and returns a reindexed array. What kind of Experience do you want to share? But hurry up, because the offer is ending on 29th Feb! Imagine you have an array of user roles, and you want to find the key for a specific role. Get paid for your published articles and stand a chance to win tablet, smartwatch and exclusive GfG goodies! Return Values Returns an array. Variables Variables Scope. The function will also do the reverse and add a multi to a single dimensional array or even a 2 tier array to a 5 tier as long as the heirarchy tree is identical.

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While using W3Schools, you agree to have read and accepted our terms of use , cookie and privacy policy. Create Improvement. Share your suggestions to enhance the article. April 14, 2 min read views Arthur C. Improve Improve. As you can see, the value '1' appears twice in the input array, but in the flipped array, it only appears once with the key 'c', as that was the latest key for the value '1' in the input array. Report issue Report. Parameters array The array in which elements are replaced. Templates We have created a bunch of responsive website templates you can use - for free! Chinmoy Lenka. W3schools Pathfinder. Note that the values of array need to be valid keys, i. All Rights Reserved.