As a php beginner, I meet a problem with calculating the elements of array in php
$effect=array("a"=>array(1,2),"b"=>array(1,2),"c"=>array(1,2));
I just want to make the result as this
$effect['a'][0]=$effect['a'][0]/$effect['a'][1];
$effect['b'][0]=$effect['b'][0]/$effect['b'][1];
$effect['c'][0]=$effect['c'][0]/$effect['c'][1];
Except do this one by one , How to do this calculation with foreach or other loop way
Your array syntax is a bit off. It should be $effect['a'][0].
The loop is trivial, and foreach was the right idea.
You can use it to iterate over all the letters using:
foreach ($effect as $letter => $numbers) {
...
}
Then put your assignment/division line in the loop, replacing the fixed 'a' and 'b' etc. with the $letter variable.
You need something like this?
foreach ($effect as $key => $val)
{
$results[$key] = $val[0] / $val[1];
}
print_r($results);
Also one counter-intuitive thing in PHP, is that arrays are passed by value by default. You can use & to get a reference to the array
$effects =array("a"=>array(1,2),"b"=>array(1,2),"c"=>array(1,2));
foreach ( $effects as $key => &$effect ) {
$effect[0] = $effect[0]/$effect[1];
unset($effect);
}
print_r( $effects );
