2 PHP arrays for merge - php

Question

How to delete element from array as it has partial in another?
Other words, I need to compare 2 array likely in_array php function, but partially.
Code:
$a = ['abc', 'cde', 'efg', 'hi'];
$b = ['bce', 'ifg', 'hig'];
// return $b without 'hig' because in $a has partially 'hi'
Thanks very much for any solution!

Answer 1

If you want to make any string in $b not have any string in $a as a substring. demo
<?
$a = ['abc', 'cde', 'efg', 'hi'];
$b = ['bce', 'ifg', 'hig'];
$b = array_filter($b, function($v) use($a){
foreach($a as $str){
if(strpos($v, $str) !== false)
return false;
}
return true;
});
print_r($b);

Answer 2

You can use array_filter() to filter the array with anonymous function. Then a combination of array_diff() and str_split() to compare each letters of each elements. This works even if the letters on the element of $a array is shuffled
$a = ['abc', 'cde', 'efg', 'hi'];
$b = ['bce', 'ifg', 'hig'];
$b = array_filter($b, function($bElem) use($a) {
foreach ($a as $aElem) {
$diff = array_diff(
str_split($aElem),
str_split($bElem)
);
if (empty($diff)) return false;
}
return true;
});
print_r($b);

Answer 3

As I understood, yuo want to compare start of string from $b with full string from $a
$b = array_udiff($b, $a,
function($x, $y) { return strcmp(substr($x, 0, strlen($y)), $y); });
demo

Answer 4

Loop through the array and look for match. If doesn't match any elements of the array, then push the value.
$a = ['abc', 'cde', 'efg', 'hi'];
$b = ['bce', 'ifg', 'hig'];
$result = $a;
foreach ($b as $bs) {
$flag = true;
foreach ($a as $as) {
if (strpos($bs, $as) !== false) {
$flag = false;
}
}
if($flag==true)
array_push($result, $bs);
}
return $result;