php - How I can replace <br /> with " " in a function -

 <?php  function show(){?>      <?php  echo "a"; ?>  <br />  }  //this function in file  <?php      echo str_replace("<br />"," ",show());//search  <br />  ?> 

how can replace <br /> " "?

you need buffer output. similar this:

ob_start(); show(); echo str_replace("<br />", " ", ob_get_clean());