Php array key value swap

Note that the values of array need to be valid keys, i. If a value has several occurrences, the latest key will be used as its value, and all others will be lost. Submit a Pull Request Report a Bug. Return Values Returns the flipped array.

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.

Php array key value swap

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I needed a way to flip a multidimensional array and came up with this function to accomplish the task. It's a useful tool for reorganizing data structures or finding specific keys based on their values.

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:.

Note that the values of array need to be valid keys, i. If a value has several occurrences, the latest key will be used as its value, and all others will be lost. Submit a Pull Request Report a Bug. Return Values Returns the flipped array. I find this function vey useful when you have a big array and you want to know if a given value is in the array. But of course everything works as expected. Just a head's up for the paranoid.

Php array key value swap

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.

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W3Schools is optimized for learning and training. Don't use this function for filtering or searching an array - PHP already has functions for exactly those purposes. Engineering Exam Experiences. Add Other Experiences. Assuming that you have a limitation to display the content into given keys order, i. It's a useful tool for reorganizing data structures or finding specific keys based on their values. View More. If several arrays are passed for replacement, they will be processed in order, the later arrays overwriting the previous values. Quizzes Test yourself with multiple choice questions. Work Experiences. Interview Experiences.

If a key from the first array exists in the second array, its value will be replaced by the value from the second array.

Typing Speed Test your typing speed. If the key exists in the second array, and not the first, it will be created in the first array. Change Language. It's a useful tool for reorganizing data structures or finding specific keys based on their values. W3Schools Coding Game! Solve Coding Problems. Return Values Returns the flipped array. Interview Experiences. Browser Statistics Read long term trends of browser usage. Since this site has helped me so much, I felt the need to return the favor. Parameters array The array in which elements are replaced.