PHP常用字符串函数

trim()

$str = "\r\nHello World!\r\n";

echo trim($str);

rtrim()|chop()

$str = "Hello World!\r\n";

echo rtrim($str);

ltrim()

$str = "\r\nHello World!";

echo ltrim($str);

dirname()

echo dirname("c:/testweb/home.php");

str_pad()

$str = "Hello World";

echo str_pad($str, 20, ".");

str_repeat()

echo str_repeat(",", 13);

str_split()

print_r(str_split("Hello"));

strrev()

echo strrev("Hello World!");

!dlroW olleH

wordwrap()

$str = "An example on a long word is : Supercalifragulistic";

echo wordwrap($str, 15);

str_shuffle()

echo str_shuffle("Hello World");

parse_str()

parse_str("id=23&name=John%20Adams", $myArray);

print_r($myArray);

array([id] => 23, [name] => John Adams)

number_format()

strtolower()

echo strtolower("Hello WORLD");

strtoupper()

echo strtoupper("Hello world");

ucfirst()

echo ucfirst("hello world");

ucwords()

echo ucwords("hello world");

htmlentities()

$str = "John & 'Adams'";

echo htmlentities($str, ENT_COMPAT);

John & 'Adams'

htmlspecialchars()

nl2br()

\n

<br>

echo nl2br("One line.\nAnother line.");

strip_tags()

echo strip_tags("Hello <b>World</b>");

addcslashes()

$str = "Hello, my name js John Adams.";

echo $str;

echo addcslashes($str, 'm');

Hello, my name js John Adams.Hello, \my na\me js John Ada\ms.