php array addition

How to add arrays in php

The array function in php is very powerful, and you can even add it directly to merge arrays.

A array

$a = ['a', 'b'];

B array

$b = ['c', 'd', 'e'];

A B result

Array
(
    [0] => a
    [1] => b
    [2] => e
)

You can see that for the same key value, the previous one will overwrite the later one.

This is different from the commonly used function array_merge:

array_merge for string key values, the latter array will overwrite the previous one

array_merge for numeric keys In terms of value, the following array will be merged with the previous one and re-indexed

Complete code

 'jack', 'age' => 20];
$b = ['name' => 'tom', 'age' => 21, 'gender' => 'male'];
print_r($a + $b);

Related recommendations: "PHP Tutorial"

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