php capitalize all letters code example

Example 1: php string to uppwe

$lowercase = "this is lower case";
$uppercase = strtoupper($lowercase);

echo $uppercase;
// THIS IS LOWER CASE

Example 2: strtoupper php

string strtoupper ( $string )

Example 3: php string only letters

$result = preg_replace("/[^a-zA-Z0-9]+/", "", $s);

Example 4: php capitalize first letter

ucfirst("hello world!");

Example 5: php open file capital letters or not

$result = current(preg_grep("/".preg_quote($filename)."/i", glob("$path/*")));