CODEWITHSUNDEEP
php
Kenneth P.
Kenneth P.

Reputation: 1816

Convert the first letter to Capital letter but ONLY for UPPERCASE strings - PHP

Anyone could help me doing this?

For example I have a string of

SOME of the STRINGS are in CAPITAL Letters

What I want exactly for the output is

Some of the Strings are in Capital Letters

Only those in UPPERCASE will be turn their first letter to capital and leave the rest as lower case.

How can I achieve this using PHP?

Thanks in advance.

Upvotes: 2

Views: 2189

Answers (5)

SubjectCurio
SubjectCurio

Reputation: 4872

if you want to avoid regular expressions

$text = "SOME of the STRINGS are in CAPITAL Letters";

$str_parts = explode(" ", $text);

foreach ($str_parts as $key => $str_part)
{
  if (ctype_upper($str_part) == strtolower(substr($str_part,1)))
  {
    $str_parts[$key] = ucfirst(strtolower($str_part));;
  }
}

$text = implode($str_parts, " ");

echo $text;

Upvotes: 1

Baba
Baba

Reputation: 95103

You can use strtolower and ucwords

$word = "SOME of the STRINGS are in CAPITAL Letters";
echo ucwords(strtolower($word));

Output

Some Of The Strings Are In Capital Letters

If you want it exactly the way you described 

$word = "SOME of the STRINGS are in CAPITAL Letters";
$word = explode(" ", $word);
$word = array_map(function ($word) {return (ctype_upper($word)) ?  ucwords(strtolower($word)) : $word;}, $word);
echo implode(" ", $word);

Output 

 Some of the Strings are in Capital Letters

Upvotes: 1

Kenneth P.
Kenneth P.

Reputation: 1816

Thanks for the answers, really helpful and it gives me ideas. I use preg_replace as well, just sharing to those who might need it too.

preg_replace('/([A-Z])([A-Z ]+)/se', '"\\1" . strtolower("\\2")', $str);

OR

preg_replace('/([?!]{2})([?!]+)/', '\1', $str);

Upvotes: 0

Anne
Anne

Reputation: 27073

Quick example:

$input = "SOME of the STRINGS are in CAPITAL Letters";
$words = explode(" ",$input);
$output = array();
foreach($words as $word)
{
    if (ctype_upper($word)) $output[] = $word[0].strtolower(substr($word,1));
    else $output[] = $word;
}
$output = implode($output," ");

Output:

Some of the Strings are in Capital Letters

Upvotes: 3

Philipp
Philipp

Reputation: 15629

you can use preg_replace_callback to find all uppercase words an replace them with a custom callback function

Upvotes: 3

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