Make every first character uppercase in array

Question

I'm trying to get all my first characters in a PHP array to be uppercase.

PHP code:

<?php
$ordlista = file_get_contents('C:/wamp/www/bilder/filmlista.txt');

$ord = explode("\n", $ordlista);

sort($ord,SORT_STRING);

foreach ($ord as $key => $val) {
    echo $val."<br/>";
}
?>

We don't have any sample data. Is it just one word per line in the file? Any multibyte characters? Are the words consistently all lowercase? — mickmackusa, Aug 13 '21 at 15:20

score 65 · Accepted Answer · answered Jul 23 '10 at 05:23

65

$ord = array_map('ucfirst', $ord);

answered Jul 23 '10 at 05:23

iroel

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or using anonymous function like this:
$ord = array_map(create_function('$value', 'return ucfirst($value);'), $ord); – iroel Jul 23 '10 at 05:32

score 21 · Answer 2 · answered Jul 23 '10 at 04:57

21

$ord=array_map(function($word) { return ucfirst($word); }, $ord);

answered Jul 23 '10 at 04:57

icktoofay

126,289
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Does'nt work... Notice: Use of undefined constant ucwords - assumed 'ucwords' in C:\wamp\www\sorting\sort.php on line 5 Warning: array_map() expects parameter 1 to be a valid callback, array must have exactly two members in C:\wamp\www\sorting\sort.php on line 5 Warning: sort() expects parameter 1 to be array, null given in C:\wamp\www\sorting\sort.php on line 7 Warning: Invalid argument supplied for foreach() in C:\wamp\www\sorting\sort.php on line 9 – Victor Bjelkholm Jul 23 '10 at 04:59
1

@Victor: Try now. For some reason it doesn't like `ucwords` as a callback, and it has to be wrapped in a closure. – icktoofay Jul 23 '10 at 05:01
@icktoofay That's not really a closure, that's an anonymous function. And functions in PHP are not first-class, so `array_map(ucfirst)` won't work, the correct syntax is `array_map('ucfirst')`. – deceze Jul 23 '10 at 05:12
1

@deceze: I was under the impression that it was a closure because if you run this in the PHP CLI interpreter: ``, you get an error saying `Object of class Closure could not be converted to string`. That, to me, says that it's a closure. – icktoofay Jul 23 '10 at 05:17
1

As the [manual states](http://www.php.net/manual/en/functions.anonymous.php): `Anonymous functions are currently implemented using the Closure class. This is an implementation detail.` It would be a closure if it *closed over* variables of the outer scope (using `use`), which it doesn't do. I guess the Closure class is used for any anonymous function because it's a subset of a closure. It's a fine distinction, admittedly. [Wikipedia even mentions](http://en.wikipedia.org/wiki/Closure_(computer_science%29): `The term closure is often mistakenly used to mean anonymous function.` – deceze Jul 23 '10 at 05:22

score 3 · Answer 3 · edited May 23 '17 at 12:26

3

To support UTF-8 multibyte characters, like "Russian" for example, you would need

$ord = array_map(function($str){
    return mb_strtoupper(mb_substr($str, 0, 1)).mb_strtolower(mb_substr($str, 1));
}, $ord);

This uses the mb_ucfirst function from https://stackoverflow.com/a/14161325/175071

edited May 23 '17 at 12:26

Community

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1

answered Jan 20 '14 at 11:54

Timo Huovinen

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score 0 · Answer 4 · answered Feb 17 '22 at 02:45

Sometimes, the raw data would looks something like this:

$ord = ['apple', 'GUAVA', 'mango', 'BANANA'];

To full-proof this:

$ord = array_map('ucfirst', array_map('strtolower', $ord));

What this does is it converts everything into a lower case first, then capitalize each word.

Make every first character uppercase in array

4 Answers4

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