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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.