How to make an array using other 2 array - php

Question

$champions array =
Array (
[0] => Shen
[1] => Graves
[2] => Lux
[3] => Tristana
[4] => Janna
[5] => Lissandra
[6] => RekSai
[7] => Anivia
[8] => Lucian
[9] => Alistar )
This array has always 10 values.
$fbps array =
Array (
[0] => RekSai
[1] => Alistar
[2] => Lucian )
This array has always 1-5 values.
What i want to make
Array (
[0] => 0
[1] => 0
[2] => 0
[3] => 0
[4] => 0
[5] => 0
[6] => 1
[7] => 0
[8] => 1
[9] => 1 )
My english is bad to explain this, i hope arrays are enough to tell. Sorry for bad title and explanation.
Edit: Ill try to explain it more. For example Shen's key is 0 in first array. $fbps array doesnt have a value named "Shen" so in third array 0 => 0. Lucian's key is 8 in first array. fbps have a value named Lucian. So third arrays 8th key has value "1"

Answer 1

$cArr = array('Shen','Graves','Lux','Tristana','Janna','Lissandra','RekSai','Anivia','Lucian','Alistar');
$fbps = array('RekSai','Anivia','Lucian');
foreach ($cArr as $key=>$value) {
if(array_search($value, $fbps) !== false) {
$cArr[$key] = 1;
} else {
$cArr[$key] = 0;
}
}
var_dump($cArr);
Or a more compact version:
$cArr = array('Shen','Graves','Lux','Tristana','Janna','Lissandra','RekSai','Anivia','Lucian','Alistar');
$fbps = array('RekSai','Anivia','Lucian');
foreach ($cArr as $key=>$value) {
$cArr[$key] = (array_search($value, $fbps) !== false) ? 1 : 0;
}
var_dump($cArr);
EDIT:
added in the !== false conditional as matches found in position 0 of the $fbps array incorrectly evaluated to false because 0 also = false in PHP land...
EDIT 2:
This function has O(N) complexity, meaning it'll grow linearly and in direct proportion to the size of the input data set.

Answer 2

Does the resulting array just have a value of 1 for every element of $fbps that appears in $champions? If so, something like this should do it;
$champions = ['Shen', 'Graves', 'Alister', '...'];
$fbps = ['Shen', 'Alister', '...'];
$result = array_map(function($value) use ($fbps) {
return (int)in_array($value, $fbps);
}, $champions);

Answer 3

I know you've already accepted an answer but here is the most efficient solution:
<?php
// Your arrays
$champions = array('Shen','Graves','Lux','Tristana','Janna','Lissandra','RekSai','Anivia','Lucian','Alistar');
$fbps = array('RekSai','Alistar','Lucian');
// New array which will store the difference
$champ_compare = array();
// Flip the array so that it is associative and uses the names as keys
// http://php.net/manual/en/function.array-flip.php
$fbps = array_flip($fbps);
// Loop all champions and use $v as reference
foreach($champions as &$v)
{
// Check for the existent of $v in the associative $fbps array
// This is leaps and bounds faster than using in_array()
// Especially if you are running this many times with an unknown number of array elements
$champ_compare[] = (int)isset($fbps[$v]);
}
unset($v);
// Flip it back if you need to
$fbps = array_flip($fbps);
print_r($champ_compare);
If you just want the most compact code and do not care about performance then you can try this:
<?php
// Your arrays
$champions = array('Shen','Graves','Lux','Tristana','Janna','Lissandra','RekSai','Anivia','Lucian','Alistar');
$fbps = array('RekSai','Alistar','Lucian');
// New array which will store the difference
$champ_compare = array();
// Loop all champions and use $v as reference
foreach($champions as &$v)
{
// Check if the current champion exists in $fbps
$champ_compare[] = (int)in_array($v, $fbps);
}
unset($v);
print_r($champ_compare);

Answer 4

Not as detailed as Garry's answer, but is based on your existing arrays.
$res = array()
foreach($champions as $key => $val) {
$res[$key] = (in_array($val, $fbps)) ? 1 : 0;
}
var_dump($res)
Edit: I've switched the array_key_exists to in_array.
<?php
$champions = array('Shen', 'Graves', 'Lux', 'Tristana', 'Janna', 'Lissandra', 'RekSai', 'Anivia', 'Lucian', 'Alistar');
$fbps = array('RekSai', 'Alistar', 'Lucian');
$res = array();
foreach($champions as $key => $val) {
$res[$key] = (in_array($val, $fbps)) ? 1 : 0;
}
var_dump($res);