PHP str_pad to print string patterns
str_pad:
Pad a string to a certain length with another string.
Syntax:- str_pad (input, pad_length, pad_string_value, pad_type) It returns the padded string.
Parameters Description
input:-The input string.
pad_length:-If the value of pad_length is negative, less than, or equal to the length of the input string, no padding takes place, and input is returned.
pad_string_input:-The pad_string may be truncated if the required number of padding characters can’t be evenly divided by the pad_string’s length.
pad_type:-Optional argument pad_type can be STR_PAD_RIGHT, STR_PAD_LEFT, or STR_PAD_BOTH. If pad_type is not specified it is assumed to be STR_PAD_RIGHT.
Print simple patterns like below using single line of code under loop.
Examples:
Input : 5 Output : * ** *** **** ***** Input : 6 Output : * ** *** **** ***** ******
<?php // PHP program to print a pattern using only // one loop. function generatePattern( $n ) { // Initialize the string $str = "" ; // Iterate for n lines for ( $i =0 ; $i < $n ; $i ++) { // Concatenate the string $str .= "*" ; echo str_pad ( $str , $n , " " , STR_PAD_LEFT), "\n" ; } } // Driver code $n = 6; generatePattern( $n ); ?> |
Output:
* ** *** **** ***** ******
Contact Us