php把字符串分割为更小的字符串（标记）的函数strtok()

<?php
$string = "Hello world. Beautiful day today.";
$token = strtok($string, " ");

while ($token != false)
{
echo "$token<br>";
$token = strtok(" ");
} 
?>

strtok(string,split)

$string = "这是PHP论坛 论坛版块 论坛栏目 论坛H管理员 论坛会员"; 
$arr = explode("论坛",$string); 
foreach($arr as $v) 
{ 
echo $v."<br />"; 
} 
echo "-------------<br />";

这是PHP 

版块 
栏目 
H管理员 
会员 
-------------

$string = "这是PHP论坛 论坛版块 论坛栏目 论坛H管理员 论坛会员"; 
$tok = strtok($string, " H"); //空格+H 
$n=1; 
while ($tok !== false) { 
echo "$tok<br />"; 
$tok = strtok(" "); //空格 
//if($n>2)break; //可以随时跳出。 
//$n++; 
} 
echo "-------------<br />";

这是P 
P论坛 
论坛版块 
论坛栏目 
论坛H管理员 
论坛会员 
-------------

$string = "This is\tan example\nstring"; 
$tok = strtok($string, " \n\t"); #空格，换行，TAB 
while ($tok !== false) { 
echo "$tok<br />"; 
$tok = strtok(" \n\t"); 
} 
echo "-------------<br />";

This 
is 
an 
example 
string 
-------------

$string = "abcde 123c4 99sadbc99b5232"; 
$tok = strtok($string, "bc"); 
while ($tok !="") { 
echo "$tok<br />"; 
$tok = strtok("bc"); 
} 
echo "-------------<br />";

a 
de 123 
4 99sad 
99 
5232 
-------------

$line = "leon\tatkinson\tleon@clearink.com"; 
for($token = strtok($line,"\t");$token!="";$token=strtok("\t")) 
{ 
print("token: $token<BR>\n"); 
}

token: leon 
token: atkinson 
token: leon@clearink.com