PHP array count or sizeof

Question

To find the number of elements in a PHP  array  which is faster better stronger   count  array  or sizeof  array     Edit  Thanks to Andy Lester  I have refined my question to mean from a multilingual perspective   The manual commenters say        sizeof  does not mean the same in   many other languages based on C    Is this true

User · Answer

They are identical according to sizeof    In the absence of any reason to worry about  faster   always optimize for the human   Which makes more sense to the human reader

User · Answer

According to the website  sizeof   is an alias of count    so they should be running the same code  Perhaps sizeof   has a little bit of overhead because it needs to resolve it to count    It should be very minimal though

User · Answer

I know this is old but just wanted to mention that I tried this with PHP 7 2    lt  php   Creating array with 1 000 000 elements  a   array    for   i   0   i  lt  1000000     i         a     100       Measure  time   time    for   i   0   i  lt  1000000000     i         b   count  a     print  1 000 000 000 iteration of count   took    time  - time    sec n      time   time    for   i   0   i  lt  1000000000     i         b   sizeof  a     print  1 000 000 000 iteration of sizeof   took    time  - time    sec n      gt    and the result was   1 000 000 000 iteration of count   took 414 sec 1 000 000 000 iteration of sizeof   took 1369 sec   So just use count

User · Answer

According to phpbench   Is it worth the effort to calculate the length of the loop in advance     pre-calculate the size of array  size   count  x     or  size   sizeOf  x    for   i 0   i lt  size   i                     don t pre-calculate for   i 0   i lt count  x    i        or  i lt sizeOf  x                 A loop with 1000 keys with 1 byte values are given                      --------- ----------                      count     sizeof      ----------------- --------- ----------    With precalc          152        212     Without precalc     70401      50644    ----------------- --------- ----------    time in   s    So I personally prefer to use count   instead of sizeof   with pre calc

User · Answer

Please use count function  Here is a example how to count array in a element   cars   array  Volvo   BMW   Toyota    echo count  cars     The count   function returns the number of elements in an array   The sizeof   function returns the number of elements in an array   The sizeof   function is an alias of the count   function

User · Answer

Both are used to count elements in a array  sizeof   function is an alias of count   function used in PHP  However  count   function is faster and butter than sizeof

User · Answer

I would use count   if they are the same  as in my experience it is more common  and therefore will cause less developers reading your code to say  sizeof    what is that   and having to consult the documentation   I think it means sizeof   does not work like it does in C  calculating the size of a datatype   It probably made this mention explicitly because PHP is written in C  and provides a lot of identically named wrappers for C functions  strlen    printf    etc

User · Answer

sizeof   is just an alias of count   as mentioned here  http   php net manual en function sizeof php

[php] PHP array: count or sizeof?

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