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 php recursive loop through multidimensional array 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.

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.

Php recursive loop through multidimensional 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. The solution is to extend the RecursiveArrayIterator class and override the hasChildren method appropriately. Using the RecursiveArrayIterator to traverse an unknown amount of sub arrays within the outer array. Note: This functionality is already provided by using the RecursiveIteratorIterator but is useful in understanding how to use the iterator when using for the first time as all the terminology does get rather confusing at first sight of SPL!

Short description: If one of the Arguments isn't an Array, first Argument is returned.

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. If the optional arg parameter is supplied, it will be passed as the third parameter to the callback.

Buckle up, fellow PHP enthusiast! We're loading up the rocket fuel for your coding adventures I have read the PHP documentation, but I'm still a bit confused about how exactly it works. I would appreciate it if someone could provide me with an example and explain how to use it effectively in my code. To provide some context, I am developing a web application that involves working with multidimensional arrays. I want to iterate through the array and perform a specific action on each element, regardless of its level of nesting. However, I need to also process the nested arrays within my multidimensional array.

Php recursive loop through multidimensional 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.

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This is not that. Applies the user-defined callback function to each element of the array. Forgot your password? If it does, overwrite with second array value. This function tends to reindex arrays, which is not mentioned in the function description. If array passed is an array, we iterate through its elements. Thought someone else might find it usefull. If using element position 2, one could create the fictitious 'pete johnson' because of the collapsing of elements. I wrote the following for merging arrays, in my project mainly for configuration Back to top. But it appears you need it. Just thought anyone may want to know about that.

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.

The presence of NULLs; here is an example of the issue and a fix. You can unset the current key, or add siblings, etc. Parameters arrays Variable list of arrays to recursively merge. Software Developer. The index of the merge array is determined by the startindex of the first array. Go to top. I read through all of the comments, and I didn't find anything that really helped me. First Prev Next Nice phil. Hopefully it helps someone in need! If you are wanting to change the values of an existing multi-dimensional array, as it says above in the note, you need to specify the first argument as a reference. Returns true on success or false on failure.