Php recursive loop through multidimensional array

Applies the user-defined callback function to each element of the array.

This iterator allows for unsetting and modifying values and keys while iterating over arrays and objects, in the same way as the ArrayIterator. Additionally, it is possible to iterate over the current iterator entry. RecursiveArrayIterator::getChildren ». Submit a Pull Request Report a Bug. If you are iterating over a multi-dimensional array of objects, you may be tempted to use a RecursiveArrayIterator within a RecursiveIteratorIterator. You are likely to get baffling results if you do. That is because RecursiveArrayIterator treats all objects as having children, and tries to recurse into them.

Php recursive loop through multidimensional array

Recently I found myself in a situation where I needed to search and remove a value from a dynamically generated multidimensional array with a different size and length. After many trials and errors, I found that the best solution is to recursively loop through the array and locate and remove the value. First thing we're doing is checking if the array passed to the function is actually an array. If array passed is an array, we iterate through its elements. I wrote this piece of code during work, to search and remove elements from a dynamically generated multidimensional array. Recursion can be a life saver in many cases, hopefully my code will help you if you ever find yourself in the same situation as mine. Sign in Email. Forgot your password? Search within: Articles Quick Answers Messages. Recursively searching and removing a value from a multidimensional array in PHP. Etienne Rached Rate me:. Please Sign up or sign in to vote.

I don't know how to proceed, and my website not made by me initially process all smarty through php, so it never includes a smarty file directly in a template And can you show me an example?

It returns the resulting array. If the input arrays have the same string keys, then the values for these keys are merged together into an array, and this is done recursively, so that if one of the values is an array itself, the function will merge it with a corresponding entry in another array too. If, however, the arrays have the same numeric key, the later value will not overwrite the original value, but will be appended. An array of values resulted from merging the arguments together. If called without any arguments, returns an empty array. Version Description 7.

Applies the user-defined callback function to each element of the array. This function will recurse into deeper arrays. Typically, callback takes on two parameters. Note : If callback needs to be working with the actual values of the array, specify the first parameter of callback as a reference. Then, any changes made to those elements will be made in the original array itself.

Php recursive loop through multidimensional array

You can walk across one-dimensional array simply, but may laboriously loop through multidimensional array in PHP using recursive methods. Truly, the multidimensional features in data need more efforts for traversal of array. Obviously, recursive methods involve many types of applications such as traversing files in a directory, Towers of Hanoi, types of Tree Traversal and so on. All codes here are not complicated, so you can easily understand even though you are still students in school.

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The first dim. The solution is to extend the RecursiveArrayIterator class and override the hasChildren method appropriately. Maybe it's just me but they don't seem to actually go more than one level deep? Is it normal that I have to do a recursive looping in PHP to create the array, then do the same recursive looping in Smarty to display it properly?? How to modify external variable from inside recursive function using userdata argument. In this version the values are overwritten only if they are not an array. I needed to add or modify values in an array with unknown structure. Short description: If one of the Arguments isn't an Array, first Argument is returned. I was looking for a function like this one : merge one ore more arrays without appending values, just override and extend the array if needed. Etienne Rached Rate me:. Formerly, at least one parameter has been required. Also note that this is actually what was suggested earlier -- the template file. First Prev Next.

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Instead, we can use PHP 5. In fact, in the above example, interchanging the empty array with any and all occurences of NULL will yield the same result. One option would be to create a version of these like so. Additionally, it is possible to iterate over the current iterator entry. Etienne Rached Rate me:. RecursiveArrayIterator::getChildren ». The presence of NULLs; here is an example of the issue and a fix. I'm completly lost after wasting like 10hours on this. View previous topic :: View next topic. This function didn't work for me - or it didn't do what I thought it would. It returns the resulting array. In this version the values are overwritten only if they are not an array. Version Description 7. Instead of, they are all renumbered, starting with 0. You know how it works, it just turns it into an array with multiple values