php_array

do you know how many functions
array_chunk
if size is less then 1 E_WARNING will be thrown and NULL returned

array_fill (compare to range)
throw e E_WARNING if null is less than zero

array_combine
throws E_WARNING if the number of keys and values ​​do not match

array_slice

array_search
if need is found in haystack more than once, the first matching key is returned

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The above has introduced php_array, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.