Why does array_push() raise a warning if the first argument is not an array?

Note: If you use array_push () to add one element to the array, it's better to use $array = because in that way there is no overhead of calling a function. Note: array_push () will raise a warning if the first argument is not an array. This differed from the $var behaviour where a new array was created, prior to PHP 7.1.0. The input array.

Does array_push check if a variable is an array first?

Empy bracket doesn't check if a variable is an array first as array_push does. If array_push finds that a variable isn't an array it prints a Warning message if E_ALL error reporting is on. So array_push is safer than , until further this is changed by the PHP developers.

Why is array_push slower than core array-access?

Since " array_push " is a function and it called multiple times when it is inside the loop, it will allocate memory into the stack. But when we are using $array = $value then we are just assigning a value to the array. Second one is a function call so generally it should be slower than using core array-access features.

How does the length of an array increase with number of variables pushed?

The length of array increases by the number of variables pushed. Has the same effect as: repeated for each passed value. Note: If you use array_push () to add one element to the array, it's better to use $array = because in that way there is no overhead of calling a function.