1. What are the functions of strlen() and mb_strlen
2. Which of the following functions uses regular expressions to split strings into arrays ()
A. Split
B. implode
C. explode
D. join
3. Write the output results of the following programs
<?php
$x=87;
$y=($x%7)*16;
$z=$x>$y?1:0;
echo $z;
?>
4. Write down the characteristics of the smarty template
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