12-29-2011
Quote:
Originally Posted by
John Tate
When dealing with arrays, it seems if I pass an array to a function although I cannot return an array - if the array is changed it changes for the whole program. The array is seemingly global.
Yes, this is a feature of both C and C++ - array names automatically
decay into pointers where appropriate. When passing an array to a function, the array is never placed on the stack (how would the called function know how large it is?) so instead a pointer is passed, and any modification through the pointer will be seen to the calling function.
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LEARN ABOUT PHP
array_push
ARRAY_PUSH(3) 1 ARRAY_PUSH(3)
array_push - Push one or more elements onto the end of array
SYNOPSIS
int array_push (array &$array, mixed $value1, [mixed $...])
DESCRIPTION
array_push(3) treats $array as a stack, and pushes the passed variables onto the end of $array. The length of $array increases by the num-
ber of variables pushed. Has the same effect as:
<?php
$array[] = $var;
?>
Note
If you use array_push(3) 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(3) will raise a warning if the first argument is not an array. This differs from the $var[] behaviour where a new array
is created.
PARAMETERS
o $array
- The input array.
o $value1
- The first value to push onto the end of the $array.
RETURN VALUES
Returns the new number of elements in the array.
EXAMPLES
Example #1
array_push(3) example
<?php
$stack = array("orange", "banana");
array_push($stack, "apple", "raspberry");
print_r($stack);
?>
The above example will output:
Array
(
[0] => orange
[1] => banana
[2] => apple
[3] => raspberry
)
SEE ALSO
array_pop(3), array_shift(3), array_unshift(3).
PHP Documentation Group ARRAY_PUSH(3)