Question 160314 in PHP Question posted in
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Can a PHP program get an array of elements?

I try to take elements from an array in php I have to check if the element is a string integer or a floating point number. Also, I have to display the result in a paragraph in the tree group the input is:

Bow
18
Alaska
4.5
France
1.5
10
13
45.1

The output is:
Group 1 – integers:
must be an integer

Group 2 – floats:
must be a float

Group 3 – strings
must be a string

My code is as follows it is totally wrong:

<?php
$elements = [];
while (FALSE !== ($line = fgets(STDIN))) {
  $elements[] = trim($line);
}
foreach ($elements as $element) {
    $data=(int)$element;
    if($data>0){
        print "<p>"."integers: ".$data." ,"."</p>";
    }elseif($data===0){
        print "<p>"."strings: ".$element."</p>";
    }
}
?>
Tags:

2

Answers


  1. 0

    Create an array with keys, like this:

    $groups = ['floats'=>[], 'ints' => [], strings => []];

    Use the is_int, is_string functions in order to detect when a variable holds an specific data type.

    More info here: PHP Documentation

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  2. 0

    Because your input is text (and your are trimming each value), every $element will be a string. You will not be able to use standard is_int() or is_float() functions on these strings.

    It may be fastest to cast the strings as a numeric type, then recast it to a string, then check if the new value is the same as the original value.

    Code: (Demo)

    $lines = <<<LINES
Bow
18
Alaska
4.5
France
1.5
10
13
45.1
LINES;

$grouped = array_fill_keys(['int', 'float', 'string'], []);
foreach (explode(PHP_EOL, $lines) as $element) {
    if ($element === (string) (int) $element) {
        $grouped['int'][] = $element;
    } elseif ($element === (string) (float) $element) {
        $grouped['float'][] = $element;
    } else {
        $grouped['string'][] = $element;
    }
}
var_export($grouped);
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