Get the first letter of each word in a string

by

explode() on the spaces, then you use an appropriate substring method to access the first character of each word.

$words = explode(" ", "Community College District");
$acronym = "";

foreach ($words as $w) {
  $acronym .= mb_substr($w, 0, 1);
}

If you have an expectation that multiple spaces may separate words, switch instead to preg_split()

$words = preg_split("/\s+/", "Community College District");

Or if characters other than whitespace delimit words (-,_) for example, use preg_split() as well:

// Delimit by multiple spaces, hyphen, underscore, comma
$words = preg_split("/[\s,_-]+/", "Community College District");

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