### PHP Programme

Print only odd number

``````<?php
for(\$i=1; \$i<=25; \$i++) {
if(\$i%2 == 0) {
\$even[] = \$i;
} else {
\$odd[] = \$i;
}
}
echo implode(",",\$odd);
?>``````

Swap number without third variable.

``````<?php
\$a=12;
\$b=15;
\$a=\$a+\$b;
\$b=\$a-\$b;
\$a=\$a-\$b;
echo \$a."<br />".\$b;
?>``````

There are three way to find max value in array

There are three way to find min value in array

Enter value of \$n

``````<?php
\$n = 2;
\$array = array(44,16,81,12);
\$unique = array();
\$unique = array_unique(\$array);
sort(\$unique);
echo \$height = \$unique[count(\$unique)-\$n];
?>``````

A prime number is a whole number greater than 1 whose only factors are 1 and itself.

Factorial of a non-negative integer, is multiplication of all integers smaller than or equal to n. For example factorial of 5 is 5*4*3*2*1 which is 120.

A series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc.

Below are the diffrent pattern like star, 123 etc...

``````<?php
\$a = '1';
\$b = &\$a;
\$b = "2\$b";
echo \$a.", ".\$b;
?>``````