How to compare two arrays using a for loop? - php

Question

I have 2 explode arrays from the database. and this is what i did.
$searches = explode(',', $searchengine);
$icons = explode(',', $icon);
$b = count($searches);
$c = count($icons);
I also made an array to compare each explode array to.
$searchesa = array("google","yahoo","bing");
$d = count($searchesa);
$iconsa = array("facebook","twitter","googleplus","linkedin","pinterest","delicious","stumbleupon","diigo");
$y = count($iconsa);
Then i used for loops to travel to different array indexes. But the result is wrong, and sometimes I have an error which says UNDEFINED OFFSET.
for ($a=0; $a <$d ; $a++) {
if ($searches[$a] == $searchesa[$a])
{echo '<br>'.$searchesa[$a].': check ';
}else
echo '<br>'.$searchesa[$a].': chok ';
}
for ($x=0; $x <$y ; $x++) {
if ($icons[$x] == $iconsa[$x])
echo '<br>'.$iconsa[$x].': check ';
else
echo '<br>'.$iconsa[$x].': chok ';
}
If the index from the database and the array I made are the same, it will state check, else it will state chok.

Answer 1

$arraysAreEqual = ($a == $b); // TRUE if $a and $b have the same key/value pairs.
$arraysAreEqual = ($a === $b); // TRUE if $a and $b have the same key/value pairs in the same order and of the same types.
taken via :
PHP - Check if two arrays are equal

Answer 2

I posted this in my comment, but I suppose the outline will work better in an answer.
I hope this could be of any help:
<?php
$array_a = ['test','test2']; // assume this is your first array
$array_b = ['test']; // assume this is the array you wan to compare against
$found = false;
foreach ($array_a as $key_a => $val_a) {
$found = false;
foreach ($array_b as $key_b => $val_b) {
if ($val_a == $val_b) {
echo '<br>'. $val_b .': check ';
$found = true;
}
}
if (!$found)
echo '<br>'. $val_a .': chok ';
}
?>
EDIT: Please excuse me for not testing it.
This thing will loop through the first array, and compare it with every value in the other array.
Tip: You can easily put this in a function and call it like compare($arr1, $arr2)

Answer 3

You can try in_array method:
$searchesa = array("google","yahoo","bing");
$iconsa = array("facebook","twitter","googleplus","linkedin","pinterest","delicious","stumbleupon","diigo",'google');
foreach($searchesa as $val){
if(in_array($val, $iconsa)){
echo "check";
} else {
echo "choke";
}
}
Note: I've added "google" in $iconsa array.

Answer 4

If I understand you correctly this is what you are looking for:
// Lets prepare the arrays
$searchEngines = explode(',', $searchengine);
$icons = explode(',', $icon);
// Now let's define the arrays to match with
$searchEnginesCompare = array(
'google',
'yahoo',
'bing'
);
$iconsCompare = array(
'facebook',
'twitter',
'googleplus',
'linkedin',
'pinterest',
'delicious',
'stumbleupon',
'diigo'
);
// Check the search engines
foreach ($searchEngines as $k => $searchEngine) {
if (in_array($searchEngine, $searchEnginesCompare)) {
echo $searchEngine." : check<br />";
} else {
echo $searchEngine." : failed<br />";
}
}
// Now let's check the icons array
foreach ($icons as $k => $icon) {
if (in_array($icon, $iconsCompare)) {
echo $icon." : check<br />";
} else {
echo $icon." : failed<br />";
}
}