PHP Exercises: Restore the original string by entering the compressed string with this rule
PHP: Exercise-72 with Solution
When character are consecutive in a string , it is possible to shorten the character string by replacing the character with a certain rule. For example, in the case of the character string YYYYY, if it is expressed as # 5 Y, it is compressed by one character.
Write a PHP program to restore the original string by entering the compressed string with this rule. However, the # character does not appear in the restored character string.
Note: The original sentences are uppercase letters, lowercase letters, numbers, symbols, less than 100 letters, and consecutive letters are not more than 9 letters.
Input: Multiple character strings are given. One string is given per line
Sample Solution: -
PHP Code:
<?php
$str = "@88 + 1 = [email protected]";
$index = 0;
$result = array();
while($index < strlen($str)) {
$t = $str[$index++];
if ($t == "@") {
$len = $str[$index++];
$char = $str[$index++];
$run = "";
for ($i = 0; $i < $len; $i++) {
$run .= $char;
}
$result[] = $run;
} else {
$result[] = $t;
}
}
echo implode("", $result);
?>
Sample Input:
@88 + 1 = [email protected]
Sample Output:
88888888 + 1 = 100000000
Flowchart:

PHP Code Editor:
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PHP: Tips of the Day
Mutates the original array to filter out the values specified
Example:
<?php function tips_pull(&$items, ...$params) { $items = array_values(array_diff($items, $params)); return $items; } $items = ['x', 'y', 'z', 'x', 'y', 'z']; print_r(tips_pull($items, 'y', 'z')); ?>
Output:
Array ( [0] => x [1] => x )
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