The difference between Array_merge and Array+array in PHP

This article describes the differences between Array_merge for array merging and Array+array for merging. If you need a friend, refer to it. Note: in PHP, Array_merge discards the original number key, while preserving the string form of key, and then forming a new array, regardless of whether the key name is the same, do not merge, unless the key name and value are the same, and the string form of the key is merged. But the Array+array is different, it will only first put the previous array of data into the newly generated array, and then see whether the second array is more than the first array, more than the number of added, it is only a few numbers, but this situation it will be added. This is the difference between the two. Take a look at the following example: ' Aass ', ' e ' = ' adsdfd ', ' asd ' = ' asdsdd ', ' ddfg ' = ' dssdf '); $b = Array (' d ' = = ' adddd ', ' adsdfd ', ' asdfsddddd ', ' d ' = ' aass '); $d = $a + $b; $e = Array_merge ($a, $b); Var_dump ($d); Var_dump ($e);? > Output Result: Array ' d ' = = String ' Aass ' (length=4) ' e ' = = String ' ADSDFD ' (length=6) ' asd ' = String ' ASDSDD ' (length=6) ' DDFG ' = = String ' dssdf ' (length=5) 0 = String ' adsdfd ' (length=6) 1 = String ' asdfsddddd ' (length=10) array ' d ' =&gt ; String ' Aass ' (length=4) ' e ' = + string ' adsdfd ' (length=6) ' asd ' = String ' ASDSDD ' (length=6) ' ddfg ' = = String ' Dssdf ' (length=5) 0 = String ' adsdfd ' (length=6) 1 = String ' asdfsddddd ' (length=10)

