﻿ PHP Function Exercise: Sort an array - w3resource

PHP function Exercises: Sort an array

PHP function: Exercise-4 with Solution

Write a PHP function to sort an array.

Visual Presentation:

Sample Salution:

PHP Code:

``````<?php
// Function to sort an array in ascending order
function array_sort(\$a)
{
// Iterate through each element of the array
for (\$x = 0; \$x < count(\$a); ++\$x)
{
// Assume the current element is the minimum
\$min = \$x;

// Iterate through the remaining elements of the array
for (\$y = \$x + 1; \$y < count(\$a); ++\$y)
{
// If a smaller element is found, update the minimum index
if (\$a[\$y] < \$a[\$min])
{
\$temp = \$a[\$min];
\$a[\$min] = \$a[\$y];
\$a[\$y] = \$temp;
}
}
}

// Return the sorted array
return \$a;
}

// Input array
\$a = array(51, 14, 1, 21, 'hj');

// Call the array_sort function with the input array and print the sorted array
print_r(array_sort(\$a));
?>
```
```

Output:

```Array
(
[0] => hj
[1] => 1
[2] => 14
[3] => 21
[4] => 51
)
```

Explanation:

In the exercise above,

• The function "array_sort()" is defined, which takes an array '\$a' as input.
• It iterates through each array element using a for loop, starting from the first element.
• Inside the outer loop, another inner loop is used to find the minimum element among the unsorted elements.
• The index of the minimum element is stored in the variable '\$min'.
• If a smaller element is found in the inner loop, it swaps the positions of the current minimum element and the new minimum element.
• After completing the inner loop, the minimum element is placed in its correct position in the array.
• This process continues until the entire array is sorted.
• Finally, the sorted array is returned.

Flowchart :

PHP Code Editor:

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