Php basic function manual for php Tutorial download

I have summarized common basic functions in php in my previous php Tutorial. today I am mainly looking for a good php basic function manual, so I have shared it with the php Tutorial download module... 1. explode () and implode ()

I have summarized common basic functions in php in my php Tutorial. today I am mainly looking for a good php basic function manual.Php Tutorial downloadModule shared...

1. explode () and implode ()

Implode () is used to connect an array, and explode () is used to split an array. in this tutorial, I wrote a comparison between explode () and implode () in the previous php Tutorial.

2. strtolower () and strtoupper ()

Strtolower () converts the string to lowercase, and strtoupper () converts the string to uppercase.

3. substr () truncates a string

Substr (String, Start, SelectNum)
Echo substr ('abcdef', 1); // bcdef

4. htmlspecialchars () and htmlentities ()

Htmlspecialchars () converts special characters to HTML format. the htmlentities () function converts characters to HTML objects.

And so on ....

: PHP elementary function. CHM