PHP output erect pyramid

$a = 10;
function zjt($a) {
            global $a;
                                                     ​$ i ++) // The number of rows that control output {
for ($ j = 1; $ j & lt; = $ a -$ i; $ j ++) // Control the number of spaces of each line {
echo "& nbsp";;
                                                                                                                                                                                                                        
                           echo "* ";                                                                 echo " }
                                                                                               20;
function dzjt($a)                                                                                                                                                                                             ​a;
                                                                                                                          // Control the number of spaces in each line of output
* Number

                                                                                                                                            ";}} H echo" & lt; br & gt; ";
}}
dzjt ($ a);*/// call the djzt () function





echo '1 ~ 100 prime:';
for($i = 2;$i <= 100;$i++)
                                                                                                                                                                                                     ($j = 2;$j < $i;$j++)
                                                                                                             //$a=0, can be divided by other numbers
                                                                                                        echo $i." " ;
}
}






echo '1 Sum of prime numbers ~100: '

$sum = 0;
for($i = 2;$i <= 100;$i++)
{
$a = 1;
for($j = 2;$ j < $i;$j++)
                                                                                                                     break; $sum = $sum + $i;
                                                                                                                                                        $sum