Simple and fast php function to compare two phone numbers

phone.php

<?php

function isEqualPhoneNumber($phoneA, $phoneB, $substringMinLength = 7)
{
    if ($phoneA == $phoneB) {
        return true;
    }

    // remove "0", "+" from the beginning of the numbers
    if ($phoneA[0] == '0' || $phoneB[0] == '0' ||
            $phoneA[0] == '+' || $phoneB[0] == '+') {
        return isEqualPhoneNumber(ltrim($phoneA, '0+'), ltrim($phoneB, '0+'));
    }

    // change numbers if second is longer
    if (strlen($phoneA) < strlen($phoneB)) {
        return isEqualPhoneNumber($phoneB, $phoneA);
    }

    if (strlen($phoneB) < $substringMinLength) {
        return false;
    }

    // is second number a first number ending
    $position = strrpos($phoneA, $phoneB);
    if ($position !== false && ($position + strlen($phoneB) === strlen($phoneA))) {
        return true;
    }

    return false;
}

// tests

$tests = array(
    array('+380441234567', '+380441234567', true),
    array('*111#', '*111#', true),
    array('923001122333', '03001122333', true),
    array('+380951000000', '380951000000', true),
    array('0951000000', '0961000000', false),
    array('0951033333', '33333', false),
    array('+380951002030', '00380951002030', true),
    array('0951002030', '095100203', false),
    array('011380951002030', '+380951002030', true)
);

$passed = 0;
foreach ($tests as $testRecord) {
    echo $testRecord[0] . ' AND ' . $testRecord[1] . PHP_EOL;

    $result = isEqualPhoneNumber($testRecord[0], $testRecord[1]);

    if ($result) {
        echo 'Equal' . PHP_EOL;
    } else {
        echo 'Not Equal' . PHP_EOL;
    }

    if ($result == $testRecord[2]) {
        $passed++;
        echo '+++' . PHP_EOL;
    } else {
        echo '---' . PHP_EOL;
    }

    echo PHP_EOL;
}

echo $passed . ' of ' . count($tests) . ' Passed' . PHP_EOL;

Test result output:

+380441234567 AND +380441234567
Equal
+++

*111# AND *111#
Equal
+++

923001122333 AND 03001122333
Equal
+++

+380951000000 AND 380951000000
Equal
+++

0951000000 AND 0961000000
Not Equal
+++

0951033333 AND 33333
Not Equal
+++

+380951002030 AND 00380951002030
Equal
+++

0951002030 AND 095100203
Not Equal
+++

011380951002030 AND +380951002030
Equal
+++

9 of 9 Passed

Hi,
I liked it, and it worked for my use case.
Nice and simple to begin with.