在PHP中组合和混合字符串

Question

I'm trying to loop something which can combine and mix 2 strings.

I want as a result, all possible combinations between characters of the given strings with the scheme "every character of the first string + every character of the second string". Example:

test & name
tame, teme, tese, tesme, teste, tname, tename, tesame, testme, tesname, testame
name & test
namt, nast, nest, namet, namst, ntest, namest, natest, namtest

I'm trying as following:

$str1 = "test";
$str2 = "name";

echo substr($str1,0,1).substr($str2,-3).','.substr($str1,0,2).substr($str2,-2).','.substr($str1,0,1).substr($str2,-4).','.substr($str1,0,3).substr($str2,-2)
.','.substr($str1,0,4).substr($str2,-1).','.substr($str1,0,2).substr($str2,-3).','.substr($str1,0,1).substr($str2,-5).','.substr($str1,0,2).substr($str2,-4)
.','.substr($str1,0,4).substr($str2,-2);

But this is partial and will require a lot to match all combinations. Also it's ugly. And also if the input strings are bigger or smaller, there will be a different amount of combinations.

Do you have any suggestion?

Answer 1

$str1 = "test";
$str2 = "name";
$len1 = strlen($str1);
$len2 = strlen($str2);
$arr3 =array();
for ($i = 0; $i <=$len1; $i++) {  
    $arr3[] = substr($str1,0,$i+1).substr($str2,($i-$len1));
}
for ($i = 0; $i <=$len2; $i++) {  
    $arr3[] = substr($str2,0,$i+1).substr($str1,($i-$len2));
}

$arr3 = array_unique($arr3);
echo implode(',', $arr3);

I came up with this