107 lines
2.0 KiB
Markdown
107 lines
2.0 KiB
Markdown
# PHP Scripts
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> Here is a single line of code to print out the date in the following mm/dd/yyyy format.
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```php
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$day = 3; $month = 4; $year = 2021; printf("%s", date('m/d/Y', strtotime("$day-$month-$year")));
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```
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OR
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```php
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$day = 23; $month = 12; $year = 2021; printf("%s", date('m/d/Y', strtotime("$month/$day/$year")));
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```
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> Print factorial of any given integer
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```php
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/**
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* To print out the whole factorial sum
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*
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* @param int $n
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*
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* @return string|int
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*
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* @since 1.0
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*/
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function factorialPrint(int $n)
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{
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static $r;
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if ($n > 0)
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{
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$r[] = $n;
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return factorialPrint(--$n);
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}
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return 'RESULT: ' . implode(' x ', array_reverse($r)) . ' = ' . array_product($r);
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}
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/**
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* Simple recursive factorial function
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*
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* @param int $n
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*
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* @return int
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*
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* @since 1.0
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*/
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function factorial(int $n): int
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{
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if ($n > 1)
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{
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return $n * factorial($n - 1);
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}
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else
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{
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return 1;
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}
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}
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/**
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* Show a range of factorials
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*
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* @param int $n
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*
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* @return bool|int
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*
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* @since 1.0
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*/
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function rangeFactorials(int $n)
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{
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// show the factorial
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echo "RESULT: factorial for $n = " . factorial($n) . '<br />';
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// check if we are done
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if ($n > 0)
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{
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return rangeFactorials(--$n);
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}
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return true;
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}
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// simple factorial option in PHP (does not work for zero)
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echo 'RESULT: factorial for 9 = ' . array_product(range(1, 9));
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// RESULT: factorial for 9 = 362880
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// get the factorial of 5
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echo factorialPrint(5) . '<br />';
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// RESULT: 1 x 2 x 3 x 4 x 5 = 120
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// get the factorial of 10
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echo 'RESULT: factorial for 10 = ' . factorial(10) . '<br /><br />';
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// RESULT: factorial for 10 = 3628800
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// Show all factorials for 0 - 10
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rangeFactorials(10);
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echo '<br />';
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// RESULT: factorial for 10 = 3628800
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// RESULT: factorial for 9 = 362880
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// RESULT: factorial for 8 = 40320
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// RESULT: factorial for 7 = 5040
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// RESULT: factorial for 6 = 720
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// RESULT: factorial for 5 = 120
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// RESULT: factorial for 4 = 24
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// RESULT: factorial for 3 = 6
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// RESULT: factorial for 2 = 2
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// RESULT: factorial for 1 = 1
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// RESULT: factorial for 0 = 1
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```
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