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Problem solve PHP interview
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| <?php | |
| function backwardsPrime($start, $stop) | |
| { | |
| $result = []; | |
| for ($val = $start; $val <= $stop; $val++) { | |
| if ((isPrimeCheck($val) && isPrimeCheck(strrev($val)) && $val != strrev($val))) { | |
| $result[] = $val; | |
| } | |
| } | |
| return $result; | |
| } | |
| function isPrimeCheck($num) | |
| { | |
| for ($i=2; pow($i, 2) <= $num; $i++) { | |
| if ($num %$i == 0) { | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| function nbDig($n, $d) | |
| { | |
| $count = 0; | |
| for ($i = 0; $i<= $n; $i++) { | |
| $sqr = $i*$i; | |
| $count += substr_count($sqr, (string)$d); | |
| // $position = substr_count($sqr, (string)$d); | |
| // if (!is_bool($position)) { | |
| // echo $sqr.'<br>'; | |
| // } | |
| //echo $i*$i .'<br>'; | |
| } | |
| echo $count; | |
| } | |
| function solution($n) | |
| { | |
| $arr = [4=>7, 7=>4]; | |
| return array_search($n, $arr); | |
| } | |
| function parse($data) | |
| { | |
| $data = strtolower($data); | |
| $value = 0; | |
| $result = []; | |
| for ($i=0; $i< strlen($data); $i++) { | |
| $input = $data[$i]; | |
| if ($input == 'i') { | |
| ++$value; | |
| } elseif ($input == 'd') { | |
| --$value; | |
| } elseif ($input == 's') { | |
| $value *=$value; | |
| } elseif ($input == 'o') { | |
| $result[] = $value; | |
| } | |
| } | |
| return $result; | |
| } | |
| function getAge($response) | |
| { | |
| // return correct age (int). Happy coding :) | |
| $age = substr($response, 0, 1); | |
| $age = (int)$age; | |
| return $age; | |
| } | |
| function isPangram($string) | |
| { | |
| $string = preg_replace('/[^a-z]+/', '', strtolower($string)); | |
| $string = count_chars($string, 3); | |
| return (strlen($string) == 26); | |
| } | |
| function getCount($str) | |
| { | |
| $vowelsCount = 0; | |
| // enter your magic here | |
| preg_match_all('/[aeiou]/i', $str, $matches); | |
| return count($matches[0]); | |
| } | |
| ?> |
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