A summary of several character functions in PHP

Here is a summary of several character functions in PHP, a summary:

1) Ucfirst
Capitalize the first letter, such as
$string = "This is my web development blog";

echo Ucfirst ($string);

Output:this is my web development blog

2) Lcfirst, lower the initial letter to lowercase
$string = "This is my Web development Blog";

echo Lcfirst ($string);

Output:this is my Web development Blog

3) Strtoupper, capitalize the entire string
$string = "This is my web development blog";

echo Strtoupper ($string);

Output:this is MY WEB development BLOG

4) Strtoplower the entire string to lowercase
$string = "This is MY WeB development BLoG";

echo Strtolower ($string);

Output:this is my web development blog

5) Ucwords (), you can capitalize the first letter of each word in a sentence, such as
$string = "This is my web development blog";

echo Ucwords ($string);

Output:this is My Web development Blog

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