Small function conversion from VB .NET to PHP

• • Reply

  14 years ago

  by PyroInACage

  Skyler Fowler

  Henderson,Nevada,USA, United States

  Joined 15 years ago
  I am trying to covnert this function to PHP.
  

      Function Between(ByVal LookIn As String, ByVal A As String, ByVal B As String) As String
          Dim First As Integer
          Dim Last As Integer
          First = LookIn.IndexOf(A)
          Last = LookIn.LastIndexOf(B)
  
          'Check for potential values that could result in an error
          If First < 0 OrElse Last < 0 OrElse First > Last Then
              'A value would result in an error so return an empty string
              Return ""
          Else
              Return LookIn.Substring(First + A.Length, Last - (First + A.Length))
          End If
      End Function
  
  
  Here is the code I have, but it doesn't work right.
  
     function between($LookIn, $A, $B)
     {
          $First = substr($lookin, strstr($lookin, $a));
          $First = substr($lookin, strstr($lookin, $b));
          If ((First < 0) || (Last < 0) || (First > Last)) 
          {
              $ret_val = '';
  		}
          Else
          {
          	$a0 = strstr($LookIn, $First) + len($a);
          	$a1 = $Last - ($First + len($a));
              $ret_val = substr($lookin,$a0, $a1);
        
          }
     }
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

  
  
  
  
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• • Reply

  14 years ago

  by akicks

  Andrew Kicks

  , United Kingdom

  Joined 14 years ago
  I have a few notes to make before you can see how I've edited the code. I've left comments there so that you'll always be reminded :)
  
  This is php. In php $a and $A are different symbols. php variable names are cAsE sEnSiTiVe.
  
  

  <?
     function between($LookIn, $A, $B)//same method header
     {
                 //note: strstr() returns a string from $A to the end of the string
                 //note: this is not vb, variables are cAsE sEnSiTiVe
                 //from the manual:
                 //string substr ( string $string, int $start [, int $length] )
                  //substr() returns the portion of string specified by the start and length parameters.
                  $indexFirst=strpos($LookIn, $A);//strpos returns the place in $lookin where $A occurs
                  $indexLast=strpos($LookIn, $B);//strpos returns the place in $lookin where $A occurs
  
          if (($indexFirst < 0) || ($indexLast < 0) || ($indexFirst > $indexLast)) 
          {
              $ret_val = '';
                  }
          else
          {
              $ret_val = substr($LookIn, $indexFirst, (strlen($LookIn)-$indexLast);
          }
          return $ret_val;//$ret_val should be between the start of $A and $B in string $LookIn
     }
  ?>
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

  
  
  
  
  
  
  
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• • Reply

  14 years ago

  by marcio_lins

  Márcio Lins

  João Pessoa, Brazil

  Joined 14 years ago
  Hi PyroInACage,
  
      I don't know really what you need! but, I wait to have helped! =]
  
      First, PHP is sensitive case! ohhhhhhh!
      len -> strlen();
      'First' is difference of $First.
  

  $First = substr($lookin, strstr($lookin, $a));
  $First = substr($lookin, strstr($lookin, $b)); //error of writing
  

  $a0 = strstr($LookIn, $First) + len($a);
  

  //this is wrong! $a0 -> need a type integer, OK!
  substr($lookin,$a0, $a1);
  
  
  

     
  <?
  function Between($LookIn, $a, $b)
  

     {
     if((!empty($a)) && (!empty($b)) && (!empty($LookIn))){
        $First = strpos($LookIn, $a);
        $Last = strpos($LookIn, $b);
  
          if (($First < 0) || ($Last < 0) || ($First > $Last))
          {
              $ret_val = 'empty';
  		}
          else
          {
              $a0 = $First + strlen($a);
          	$a1 = $Last - ($First + strlen($a));
              $ret_val = substr($LookIn, $a0, $a1);
          }
          }else{
          $ret_val = "The String A, B or LookIn is empty";
          }
         return $ret_val;
     }
  
  $funct = between("Hello Word!!!", "e", "W");
  echo $funct;
  ?>
  
  Kind Regards,
  Marcio Lins
  Solution Developer
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

  
  
  
  
  
  
  
  
  
  
  
  
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