'Captilizing particular words in PHP string

I would like to take a string and seek out specific words and capitalize them. So for a string like "Lorem ipsum dolor sit amet, consectetur adipisicing elit.", I want to be able to only captalize ipsum and adipisicing. So basically put a capitalization filter on certain words.

How can this be done?

php

Solution 1:^[1]

Don't use regex for this, str_replace is the clearest, easiest way:

$str = str_replace(
    array('ipsum','adipisicing'), 
    array('Ipsum','Adipisicing'), 
    'Lorem ipsum dolor sit amet, consectetur adipisicing elit.'
);

Or a bit more clever:

$words = array('ipsum', 'adipisicing');
$str = str_replace($words, array_map('ucfirst', $words), 'Lorem ipsum dolor sit amet, consectetur adipisicing elit.');

Solution 2:^[2]

$capitalize_me = array('word1','word2'....'wordn');
$capitalized  = array_map('ucfirst',$capitalize_me);
$new_sentence = str_replace($capitalize_me,$capitalized,$old_sentence);

not the most efficient, but does the work

Solution 3:^[3]

There are too many ways to do this...

preg_replace
str_replace
implode string into an array and iterate through with str_replace, then explode array back into a string

Solution 4:^[4]

$str = 'Lorem ipsum dolor sit amet, consectetur adipisicing elit.';
$caps = 'ipsum|adipisicing';
echo preg_replace_callback(
    '/(^|\s)('.$caps.')(\s|$)/'
  , function($m){ return $m[1].ucfirst($m[2]).$m[3]; }
  , $str
);

That regexp could probably be better (I'm thinking you could use \W), but if you don't account for whitespace before/after the word, it will replace in the middle of words too.

Solution 5:^[5]

This works well for me:

<?php 

$word_array = array('ipsum', 'adipisicing');
$soucre_sentence = 'Lorem ipsum dolor sit amet, consectetur adipisicing elit.';

$captilize_words = array();
$replacements_captalized = array();
$replacements_all_caps = array();

foreach ($word_array as $word) {
  $captilize_words[] = '/\b' . $word . '\b/i';
  $replacements_captalized[] = ucfirst(strtolower($word));
  $replacements_all_caps[] = strtoupper($word);
}

$ret = preg_replace($captilize_words, $replacements_all_caps, $soucre_sentence);

echo $ret;

?>

Added capitalized and ALL CAPS replacements since I am not clear on what you really want your output to be. Choose one!

EDIT: Genuinely did not know about the flexibility of array_map (that @mmattax) and reworked it one last time with that tip.

<?php 

$word_array = array('ipsum', 'adipisicing');
$soucre_sentence = 'Lorem ipsum dolor sit amet, consectetur adipisicing elit.';

$captilize_words = array_map(function ($word) { return '/\b' . $word . '\b/i'; }, $word_array);
$replacements_captalized = array_map('ucfirst', $word_array);
$replacements_all_caps = array_map('strtoupper', $word_array);

$ret = preg_replace($captilize_words, $replacements_all_caps, $soucre_sentence);

echo $ret;

?>

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2	mayersdesign
Solution 3	Ian Atkin
Solution 4	mcovey
Solution 5

'Captilizing particular words in PHP string

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]