Compare two string with numbers if have similarity

Question

I am looking for a function in PHP that can do a comparison of two strings with numbers. They should at least 5 same letters/number in consecutive order.

Example: AD-2018-34567-234 and cd 34567 both contains same letters/number = 34567

OR

10256 and cd 10256 both contains 10256

OR

1234567890- rfwet043-123455-cd1234-sdf and 4edgs-cd12340e-3ed both contains cd1234

Tried using this function here but doesn't meet my needs.

$str1 = "AD-2018-34567-234";
$str2 = "cd 34567";

$str3 = "10256";
$str4 = "cd 10256";

$str5= "1234567890-rfwet043-123455-cd1234-sdf";
$str6= "4edgs-cd12340e-3ed";

if(strpos($str1, $str2) !== false) {
    echo "matched";
}else{
    echo "not matched";
}

if(strpos($str3, $str4) !== false) {
    echo "matched";
}else{
    echo "not matched";
}

if(strpos($str5, $str6) !== false) {
    echo "matched";
}else{
    echo "not matched";
}

Tried also strpos all did not match.

Possible duplicate of [How can I find the Largest Common Substring between two strings in PHP?](https://stackoverflow.com/questions/336605/how-can-i-find-the-largest-common-substring-between-two-strings-in-php) — Robby Cornelissen, Jul 25 '18 at 08:47

Andreas · Accepted Answer · 2018-07-25T10:03:11.147

This does what you want by looping the find string and only using five charaters at the time to match with.

$str1 = ["AD-2018-34567-234","10256","1234567890-rfwet043-123455-cd1234-sdf"];
$str2 = ["cd 34567","cd 10256","4edgs-cd12340e-3ed"];

foreach($str1 as $key => $str){
    $find = $str2[$key];
    $l = strlen($find);
    $match = false;
    for($i=0; $i<=($l-5);$i++){ // loop the find string 
        //echo $str . " " . substr($find,$i, 5) . "\n"; // debug
        if(strpos($str, substr($find,$i, 5)) !== false) { // take five characters at the time and stros them
            $match = true;
            break;
        }
    }
    if($match){
        echo "match\n";
    }else{
        echo "no match\n";
    }
}

If you uncomment the line that is commented you will see how it works

https://3v4l.org/unp0D

$str1 = "AD-2018-34567-234";
$find = "cd 34567";
$l = strlen($find);

$match = false;
for($i=0; $i<=($l-5);$i++){ // loop the find string 
    //echo $str1 . " " . substr($find,$i, 5) . "\n"; // debug
    if(strpos($str1, substr($find,$i, 5)) !== false) { // take five characters at the time and stros them
        $match = true;
        break;
    }
}
if($match){
    echo "match\n";
}else{
    echo "no match\n";
}

Thank you for this. Can give me a sample with only one value for $str1 and $str2? — c.k, Jul 25 '18 at 10:01

score 0 · Answer 2 · answered Jul 25 '18 at 08:53

0

tryout this solution

<?php
$str1 = "AD-2018-34567-234";
$str2 = "cd 34567";

$str3 = "10256";
$str4 = "cd 10256";

$str5= "1234567890-rfwet043-123455-cd1234-sdf";
$str6= "4edgs-cd12340e-3ed";

$val=similar_text($str1, $str2,$per);
if($val>=5){
    echo "Matched";
}else{
    echo "Not matched";
}

$val=similar_text($str3, $str4,$per);
if($val>=5){
    echo "Matched";
}else{
    echo "Not matched";
}

$val=similar_text($str5, $str6,$per);
if($val>=5){
    echo "Matched";
}else{
    echo "Not matched";
}

answered Jul 25 '18 at 08:53

Dhanu K

11,288
6
24
38

Similar_text doesn't require it to consecutive does it? – Andreas Jul 25 '18 at 09:04
Yes it does not require it. – c.k Jul 25 '18 at 09:09

Compare two string with numbers if have similarity

2 Answers2