PHP Program to remove special characters from a string using str_replace()

<?php
    #string 
    $str= 'We, welcome all of you, to our school <of PHP>.
    This--> school is one of its kind :).
    Many schools dont offer this subject :(';

    $str = str_replace( array( '\'', '(',')', ',' , ':', '<', '>','.',' ','-' ), '',$str); 

    // Printing the result 
    echo $str;  
?>

Output

WewelcomeallofyoutoourschoolofPHP
Thisschoolisoneofitskind
Manyschoolsdontofferthissubject