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STRING <?php $mystr="php is a server side scripting language"; echo "<strong> the given string is :</strong> $mystr <br>"; echo "<strong> the length of string is :</strong>".strlen($mystr)."<br>"; echo "<strong> the count of string is :</strong>".str_word_count($mystr)."<br>"; echo "<strong> the reverse of string is :</strong>".strrev($mystr)."<br>"; $substr="side"; echo "<strong> the position of string is '$substr' in the string is :</strong>".strpos($mystr,$substr); Files <?php $fname="file1.txt"; $fptr=fopen($fname,"r"); $content=fread($fptr,filesize($fname)); $fptw=fopen("file2.txt","w"); fwrite($fptw,$content); echo"<strong>the content copied in file2 is:</strong> <br>".$c...