What is the use of array merge function in php?
(PHP 4, PHP 5, PHP 7, PHP 8) Show array_merge — Merge one or more arrays Descriptionarray_merge(array If the input arrays have the same string keys, then the later value for that key will overwrite the previous one. If, however, the arrays contain numeric keys, the later value will not overwrite the original value, but will be appended. Values in the input arrays with numeric keys will be renumbered with incrementing keys starting from zero in the result array. Parametersarrays Variable list of arrays to merge. Return ValuesReturns the resulting array. If called without any arguments, returns an empty array. Changelog
ExamplesExample #1 array_merge() example
The above example will output: Array ( [color] => green [0] => 2 [1] => 4 [2] => a [3] => b [shape] => trapezoid [4] => 4 ) Example #2 Simple array_merge() example
Don't forget that numeric keys will be renumbered!
If you want to append array elements from the second array to the first array while not overwriting the elements from the first array and not re-indexing, use the
The keys from the first array will be preserved. If an array key exists in both arrays, then the element from the first array will be used and the matching key's element from the second array will be ignored. array(5) { [0]=> string(6) "zero_a" [2]=> string(5) "two_a" [3]=> string(7) "three_a" [1]=> string(5) "one_b" [4]=> string(6) "four_b" } Example #3 array_merge() with non-array types
The above example will output: Array ( [0] => foo [1] => bar ) See Also
Julian Egelstaff ¶ 13 years ago
[0] = "zero"; ChrisM ¶ 9 months ago
$i=0 ; $i<10000000 ; $i++) { Andreas Hofmann ¶ 10 months ago
JoshE ¶ 6 months ago
What is merge in array?array_merge(array ...$arrays ): array. Merges the elements of one or more arrays together so that the values of one are appended to the end of the previous one. It returns the resulting array. If the input arrays have the same string keys, then the later value for that key will overwrite the previous one.
Does array merge remove duplicates PHP?Definition and Usage
The array_unique() function removes duplicate values from an array. If two or more array values are the same, the first appearance will be kept and the other will be removed.
What is array merge recursive in PHP?The array_merge_recursive() is an inbuilt function in PHP and is used to merge two or more arrays into a single array recursively. This function is used to merge the elements or values of two or more arrays together into a single array.
What is the difference between array merge and array Combine?array_combine(): It is used to creates a new array by using the key of one array as keys and using the value of another array as values. 2. array_merge(): It merges one or more than one array such that the value of one array appended at the end of the first array.
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