Differences between array_merge and + in PHP

The difference between array_merge and + in PHP: array_merge () combines two or more arrays, and the values in an array are appended to the values of the previous array. Returns an array of results. If the input array contains the same string key name, the value after the key name overwrites the previous value. However, if the array contains a number key name, the subsequent values will not

The difference between array_merge and + in PHP: array_merge () combines two or more arrays, and the values in an array are appended to the values of the previous array. Returns an array of results. If the input array contains the same string key name, the value after the key name overwrites the previous value. However, if the array contains a number key name, the subsequent values will not

Differences between array_merge and + in PHP

• Array_merge () combines two or more arrays. The values in an array are appended to the values of the previous array. Returns an array of results.
  If the input array contains the same string key name, the value after the key name overwrites the previous value. However, if the array contains a number key name, the subsequent values will not overwrite the original values, but will be appended to the back.
• Merge arrays with "+:
  If the array contains the same key, the first value will be returned as the final result, and the values with the same key name in the subsequent array will be discarded (note: instead of overwriting, the value that appears first is retained ).

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