PHP array comparing - php

Question

I want to compare two arrays in php. I don't want to do it overall, but block by block.
kind of like this
if (a[1] == b[1]){ // do something }
if (a[2] == b[2]){ // do more }
how can i do this without a whole bunch of ifs ?
thanks in advance :)
$a = array(1, 2, 3, 5);
$b = array(1, 1, 1, 1);
$c = array('something', 'something', 'and so forth');
foreach($a as $key => $value){
if($value == $b[$key]){
echo $c[$key]. '<br />';
}
}
my answer. compare 2 arrays, then rune some code. triggered by the blocks that match

Answer 1

for($i=0;$i<sizeof(a);$i++){
if(a[$i]==b[$i]){
//DO SOMETHING
}
}

Answer 2

want to compare whole array element one by one (assuming both array of same length)
foreach($a as $key => $value){
if($value == $b[$key])
{
// do something
}
else
{
break; // stop doing something and break
}
}
if want to compare some keys
$keys = array('key1', 'key2');
foreach($keys as $value){
if($a[$value] == $b[$value])
{
// true
}
else
{
// false
}
}

Answer 3

$a = array(1, 3 , 5 ,6 , 7);
$b = array(3, 1, 5, 6, 8 ,9);
$array_size = min(count($a), count($b));
for ($i = 0; $i < $array_size; $i++) {
if ($a[$i] == $b[$i]) { //you could/should check whether the index is present.
//some code
}
}
This only works for arrays with the same uniformly distributed numerical index.

Answer 4

foreach(array_intersect_assoc($a,$b) as $key => $data)){
switch($key){
case 1:
//something
break;
case 2:
//something
break;
}
}

Answer 5

for ($i=0; $i < count($a) && $i < count($b); ++$i) {
if ($a[$i] == $b[$i]){
// this is true
} else {
// this is false
}
}

Answer 6

A good ol for loop should do the trick. You can start with an array of things to do:
$arrayOfThingsToDo = array( "someFunc", "anotherFunc", "yetAnotherFunc" );
$arrayOfA = array( "one", "two", "three" );
$arrayOfB = array( "one", "not two", "three" );
function doCompare($a, $b, $f) {
$len = count($a);
for($i = 0; $i < $len; $i++) {
if($a[$i] == $b[$i]) {
$f[$i]();
}
}
}
Good luck!