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In this tutorial, we will be learning how to implement star patterns in PHP. Printing different patterns in PHP is simple and easy to learn. And it would be good to have knowledge in other programming languages like C or C++. We can print pyramid triangle patterns, star patterns, number patterns, etc. We will be learning them in this tutorial, out of many different patterns. We use for loop to print these patterns. We can use the for each loop also and nested for loop to print these patterns. In these nested loops, we will be using an outer loop and inner loop to print the stars for one particular pattern.
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Below are the 6 examples of Star Patterns in PHP:
Code:
<?php //example to demonstrate star pattern-1 for($i=0; $i<5; $i++) { for($j=0; $j<5; $j++) { echo '*'; } echo '<br>'; } ?> <p><strong>Output:</strong></p> <p><img src="https://img.php.cn/upload/article/000/000/000/172490831928314.png" alt="Star Patterns in PHP" ></p> <h4>Example #2</h4> <p>In this example, the i for loop iterates 5 times and for each value of i, the inner j for loop will iterate and print as star *. The j for loop is used to print the stars. For the initial value of i as 1, one star will be printed. Next for the value of 2, two stars in one row will be printed, again for the value of 3, three stars will be printed and this will continue till the value is not greater than 5.</p> <p><strong>Code:</strong></p> <pre class="brush:php;toolbar:false"><?php //example to demonstrate star pattern-2 for($i=1; $i<=5; $i++) { for($j=1; $j<=$i; $j++) { echo '*'; } echo '<br>'; } ?>
Output:
In this example, the i for loop will loop 5 times as we want 5 rows. The j for loop is used to print * depending upon the value of i. For the first time as we want 5 stars in the first row, so for the first value of i as 1, the j loop will print 5 stars. Next for the value of 2, the j loop will print 4 stars, for the next value 3, the j loop will print 3 times and so on. This will stop once the condition of i is greater than 5 and will print the desired output.
Code:
<?php //example to demonstrate star pattern-3 for($i=1; $i<=5; $i++) { for($j=5; $j>=$i; $j--) { echo '*'; } echo '<br>'; } ?>
Output:
In this example, the value I for loop is iterated 5 times, as the number of rows in the star pattern is 5. Also in this example, we are using j for loop to print spaces and a new k for loop is used to print stars *.
Code:
<?php //example to demonstrate star pattern-4 for($i=1; $i<=5; $i++) { for($j=4; $j>=$i; $j--) //loop to print spaces { echo ' '; } for($k=1; $k<=$i; $k++) //loop to print stars { echo '*'; } echo '<br>'; } ?>
Output:
In this example, three loops are used, one for the number of rows, second for the printing of spaces and third to print the stars. Both the loops defined are dependent on the value of i.
Code:
<?php //example to demonstrate star pattern-5 for($i=1; $i<=6; $i++) { for($j=1; $j<=$i; $j++) //loop to print spaces { echo ' '; } for($k=5; $k>=$i; $k--) //loop to print stars { echo '*'; } echo '<br>'; } ?>
Output:
In this example, there is a combination of two stars patterns upper triangle and lower triangle. These triangles are already explained in the previous examples and for this, we use three loops, one for the number of rows, second for the printing of spaces and third for the printing of stars and this loop is repeated again with different initial values of i and j along with different conditions for the next half of the triangle pattern.
Code:
<?php //example to demonstrate star pattern-5 // this loop prints the upper half of the star pattern for($i=1; $i<=5; $i++) { for($j=1; $j<=$i; $j++) //loop to print spaces { echo '*'; } echo '<br>'; } // this loop prints the lower half of the pattern for($i=1; $i<=5; $i++) { for($j=4; $j>=$i; $j--) //loop to print stars { echo '*'; } echo '<br>'; } ?>
Output:
In this article, star patterns in PHP are explained. We have seen different forms of star patterns. These patterns are with an explanation of how the condition works, how the looping works to print the stars as desired.
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