4

我正在尝试获取 PHP 中两个字符串之间交集的第一段。像这样的东西：

$a = 'Metric Bob Foundation A5, Lined, Pink & Orange';
$b = 'Metric Bob Foundation A5, Lined, Navy & Green';
echo SOME_FUNCTION($a, $b);

// Expected output: 'Metric Bob Foundation A5, Lined, '

任何人都可以帮助我解决 SOME_FUNCTION。

我在这里用过这个：

function string_intersect($string1, $string2)
{
    $array1 = $array2 = array();

    for($i = 0, $j = 0, $s1_len = strlen($string1), $s2_len = strlen($string2);($i < $s1_len) || ($j < $s2_len); $i++, $j++) {
        if($i < $s1_len) {
            $array1[] = $string1[$i];
        }
        if($j < $s2_len) {
            $array2[] = $string2[$j];
        }
    }

    return implode('', array_intersect($array1, $array2));
}

但它返回：// Metric Bob Foundation A5, Lined, in & rane

这不太对。正如我所说，我只想要第一部分。

提前致谢。

4

4 回答 4

2

演示

function some_function($a, $b)
{
    $result = '';
    $len = strlen($a) > strlen($b) ? strlen($b) : strlen($a);
    for($i=0; $i<$len; $i++)
    {
        if(substr($a, $i, 1) == substr($b, $i, 1))
        {
            $result .= substr($a, $i, 1);
        }
        else
        {
            break;
        }
    }
    return $result;
}

$a = 'Metric Bob Foundation A5, Lined, Pink &amp; Orange';
$b = 'Metric Bob Foundation A5, Lined, Navy &amp; Green';
echo some_function($a, $b);

输出

Metric Bob Foundation A5, Lined,
于 2013-06-06T07:02:14.387 回答
0 
function compString($a, $b){
    $arr = explode(" ", $a);
    $brr = explode(" ", $b);
    $final = array();
    for($i=0 ; $i < count($arr); $i++)
    {
        if($arr[$i] == $brr[$i])
            $final[] = $arr[$i];
        else
            break;
    }
    echo implode(" ", $final);
}

用法

$a = 'Metric Bob Foundation A5, Lined, Pink &amp; Orange';
$b = 'Metric Bob Foundation A5, Lined, Navy &amp; Green';
compString($a, $b);
于 2013-06-06T06:59:23.700 回答
0

尝试这个， 

 <?php
 function get_match($a, $b)
 {
 $tmp='';
 $a=str_split($a);
 $b=str_split($b);
 foreach($a as $key => $data)
 {
   if($data==$b[$key])
 $tmp.=$data;
else
 return $tmp;   
  }
 return $tmp;
}
$a = 'Metric Bob Foundation A5, Lined, Pink &amp; Orange';
$b = 'Metric Bob Foundation A5, Lined, Navy &amp; Green';
echo get_match($a, $b);


?>

输出

 Metric Bob Foundation A5, Lined,
于 2013-06-06T07:05:15.500 回答
0 
function getIntersection ($str1,$str2)
{
    //get the min length of str1 & str2
    $l = strlen($str1) <= strlen($str2)? strlen($str1):strlen($str2);
    $intersection = "";
    //substring length
    $i = 0;
    while($i < $l && (substr($str1,0,$i) == substr($str2,0,$i) ))
    {
        $i++;
    }
    return substr($str1,0,$i-1);
}
$a = 'Metric Bob Foundation A5, Lined,sdf Pink &amp; Orange';
$b = 'Metric Bob Foundation A5, Lined, Navy &amp; Green';
echo getIntersection ($a, $b);

输出：

公制 Bob Foundation A5，内衬，

演示链接

于 2013-06-06T07:09:06.967 回答