PHP English Letter Case Conversion function Summary _php tips

Converts the first letter of each word to uppercase: Ucwords ()

Copy Code code as follows:

<?php
$foo = ' Hello world! ';
$foo = Ucwords ($foo); Hello world!

$bar = ' HELLO world! ';
$bar = Ucwords ($bar); HELLO world!
$bar = Ucwords (Strtolower ($bar)); Hello world!
?>

Capitalize the first letter of a word: Ucfirst ()

Copy Code code as follows:

<?php
$foo = ' Hello world! ';
$foo = Ucfirst ($foo); Hello world!

$bar = ' HELLO world! ';
$bar = Ucfirst ($bar); HELLO world!
$bar = Ucfirst (Strtolower ($bar)); Hello world!
?>

First letter to lowercase: lcfirst ()

Copy Code code as follows:

<?php
$foo = ' HelloWorld ';
$foo = Lcfirst ($foo); HelloWorld

$bar = ' HELLO world! ';
$bar = Lcfirst ($bar); HELLO world!
$bar = Lcfirst (Strtoupper ($bar)); HELLO world!
?>

Capitalize all letters: Strtoupper ()
All letters to lowercase: strtolower ()