Find A smarter method: remove the parts starting with string A and starting with string B.

Remove the parts starting with string A and starting with string B. For example, if {code...} is extracted, the homenews stupid method is: {code...} removes the same part starting with string A and starting with string B.

For example

$a = '/www/proj-asd/app/home/news';$b = '/www/proj-asd/app/_view';

The extracted part ishome/news

The stupid method is:

$a = '/www/proj-asd/app/home/news';$b = '/www/proj-asd/app/_view';echo getRelPath($a, $b); // home/newsfunction getRelPath($a, $b){    $a = strtr($a, '\\', '/');    $b = strtr($b, '\\', '/');    $a = explode('/', $a);    $b = explode('/', $b);    foreach ($a as $i=>$av) {        $bv = $b[$i];        if ($av===$bv) {            unset($a[$i]);        }else{            break;        }    }    return implode('/', $a);}

Reply content:

Remove the parts starting with string A and starting with string B.

For example

$a = '/www/proj-asd/app/home/news';$b = '/www/proj-asd/app/_view';

The extracted part ishome/news

The stupid method is:

$a = '/www/proj-asd/app/home/news';$b = '/www/proj-asd/app/_view';echo getRelPath($a, $b); // home/newsfunction getRelPath($a, $b){    $a = strtr($a, '\\', '/');    $b = strtr($b, '\\', '/');    $a = explode('/', $a);    $b = explode('/', $b);    foreach ($a as $i=>$av) {        $bv = $b[$i];        if ($av===$bv) {            unset($a[$i]);        }else{            break;        }    }    return implode('/', $a);}

First, the question is interpreted as Path Matching (rather than pure string)

Soarray_diff_assocIt may be the method that the subject wants.

Update and solve the bug mentioned by @ AlanZhang

php
  

http://3v4l.org/eB8Km

It is required that all characters be matched only when each character is matched.

for(var index=0;index<$a.length;index++){    if($a.charAt(index)!=$b.charAt(index)){       return $a.substring(index);    }}

Sit down and try again.

For ($ I = 0; $ I
   

Isn't callback faster? If the address is determined, convert it to an array and then use the callback function. The idea is similar and you will not write it.

$a = '/www/proj-asd/app/home/news';$b = '/www/proj-asd/app/_view';function getRelPath($a, $b){    if($a[0] != $b[0]) return $a;    return getRelPath(substr($a, 1), substr($b, 1));}var_dump(getRelPath($a, $b));

The jsven method is the same as that of the main user.
Yan Shijie's method is actually the same as that of the poster, but it is a recursive version.

Here is an idea to take the minimum length of a B.
Then perform a binary classification.

$ A = '/www/proj-asd/app/home/News ';
$ B = '/www/proj-asd/app/_ view ';

Half cut, the same as/www/proj-.

The remaining part is 'sd/app/_ view', followed by half,
Is sd/app/, the same. In this case, the same part is/www/proj-asd/app/

The remaining values are 'home/'and'View 'comparison.
Cut half, ho and _ v, different.
Half more, h and, Different.

So the same part is/www/proj-asd/app/

However, when the code is written, it is certainly not easy to compare characters directly.

If you want to edit a file list, such as removing the version library directory from the file list in the SVN log, you can directly use column Editing:
Gg-Move to the beginning
Ctrl + v-start column Mode
W or l-move the cursor to the right to the desired position
...
X-delete a public prefix

After skill, it is much faster than Ctrl + h.

It can be replaced with the string location search function, but shell is recommended.

Simply replace a regular expression with null ....