PHP Trim Usage solver, how to handle

PHP Trim Usage Solver
Take a first three-bit string of IP, the great god help me to see the string '. ' No, it's not going to go off.

PHP Code

  
   $str = ' 192.168.175.45 '; $arr = explode ('. ', $str); Array_pop ($arr); $output = '; foreach ($arr as $k) {    $output. = '. '. $k; }ltrim ($output, '. '); Print_r ($output);

Output. 192.168.175

------Solution--------------------
$output =ltrim ($output, '. ');
Print_r ($output);
------Solution--------------------
$output = LTrim ($output, '. ');

But there is no need for LTrim () Processing:

PHP code

 $str = ' 192.168.175.45 '; $arr = explode ('. ', $str); Array_pop ($arr); $output = Implode ('. ', $arr);p Rint_r ($output); 
------Solution--------------------
 can also be written like this: 
 
   
   

    
     PHP code 
    
    
------Solution--------------------
 Your source 
     
     

      
       PHP code 
      
      
$ Str= ' 192.168.175.45 '; $arr = explode ('. ', $str); Array_pop ($arr); $output = "; foreach ($arr as $k) {$output. = '. '. $k; } $output = LTrim ($output, '. '); Print_r ($output); 
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