使用字符串比较函数比较另一个数组中的值是否存在于另一个数组中

Question

I have 2 comma separated values, which I convert in 2 arrays, named: $companyCad and $programCad

Those 2 arrays return values in the following format:

$companyCad

Array
(
    [0] => 52.10
    [1] => 62
    [2] => 64.15.44.25
    [3] => 65.10
    [4] => 65.14
    [5] => 65.21
    [6] => 70
    [7] => 71
    [8] => 71.15.12
    [9] => 93.55
)

$programCad

Array
(
    [0] => 92.55
    [1] => 92.74
    [2] => 93
    [3] => 94.10
    [4] => 98.12
    [5] => 98.66
)

To compare if any of the $companyCad values exist in the $programCad I use the following code:

if (array_intersect($companyCad, $programCad)) {
    echo "Found";
} else {
   echo "Not found";
}

Above code return not found since 93.55 from $programCad is not found in the array $companyCad. I know that the code works just fine.

However I need partial match, that is:

If the value of the $companyCad is longer than value of the $programCad for example $companyCad[9] = 93.55 and the $programCad[2] = 93 that should be considered as match.

If the $companyCad[9] = 93.55 and the $programCad[2] = 93.1 it should not be considered as match however.

If the $companyCad[9] = 93.5X and the $programCad[2] = 93.5 it should be considered as match also. (X = any number)

Here are some more explanations of eventual format of the array values:

Array value will have at least 2 digits = XX The shortest value may be XX while the longest is XX.XX.XX.XX However it may end with 1 digit in some cases, example XX.X or XX.XX.X for example.

Any idea how can I do this partial match?

Answer 1

One way to accomplish it is using nested loops and strpos to look if the haystack (value from first loop) starts with the needle (value from second loop).

$companyCad = array("52.10", "62", "64.15.44.25", "65.10", "65.14", "65.21", "70", "71", "71.15.12", "93.55");
$programCad = array("92.55", "92.74", "93", "94.10", "98.12", "98.66", "71.1");

$found = false;
foreach($companyCad as $comp) {
    foreach($programCad as $prog) {
        if(strpos($comp, $prog) === 0) {
            $found = true;
            break;
        }
    }
}

if($found === true) {
    echo "Found";
} else {
    echo "Not Found";
}

Live demo