0x01:根据预定义的字符对字符串进行词法分析
复制代码 代码如下:
$info="lv chen yang|Hello:world&757104454@qq.com";
//定义界定符，包括(|)(:)( )(&)
$tokens="|:& ";
$tokened=strtok($info, $tokens);
while ($tokened)
{
echo "Element:$tokened
";
//连续调用strtok()函数，完成对整个字符串的词法分析
$tokened=strtok($tokens);
}
?>
0x02:根据预定义的定界符分解字符串
复制代码 代码如下:
$summary="
In the latest installment of the ongoing Developer.com PHP series.
I discuss the many improvements and addtions to
PHP object-oriented architecture.
";
echo "
";
$words=explode(' ', strip_tags($summary));
echo "This sentence's lenght is:".sizeof($words);
?>
0x03:将数组转换成字符串
复制代码 代码如下:
$citys=array("Chengdu","Chongqing","Beijing","Shanghai","Guangzhou");
$citystring=implode("|", $citys);
echo $citystring;
?>
0x04:解析复杂的字符串
复制代码 代码如下:
$substr="index.html";
$log=<<
192.168.1.2:/www/htdocs/index.html:[2013/06/26:13:27:16]
192.168.1.3:/www/htdocs/index.html:[2013/06/26:13:28:45]
logfile;
echo "
";
//$substr在log中首次出现的位置是什么
$pos=strpos($log, $substr);
//查找行结束的数值位置
$pos1=strpos($log,"n",$pos);
//计算时间戳的开始
$pos=$pos+strlen($substr)+1;
//检索时间戳
$timestamp=substr($log, $pos,$pos1-$pos);
echo "The file index.html was first accessed on: $timestamp
";
?>
0x05：找到字符串最后一次出现的位置
复制代码 代码如下:
$limit=100;
$summary="In the latest installment of the ongoing Developer.com PHP series.
I discuss the many improvements and addtions to
PHP object-oriented architecture. ";
if(strlen($summary)>$limit)
$summary=substr($summary, 0,strrpos(substr($summary, 0,$limit)," "))."...";
echo $summary;
?>
0x06：用另外一个字符串替换字符串的所有实例
复制代码 代码如下:
$email="lvchenyang@live.cn";
$email=str_replace("@", "(at)", $email);
echo "
".$email;
?>
0x07：获取字符串的一部分
复制代码 代码如下:
$url="lvchenyang@live.cn";
echo "
".ltrim(strstr($url, "@"),"@");
?>
0x08：根据预定义的便宜返回字符串的一部分
复制代码 代码如下:
$str="lvchenyang";
echo "
".substr($str, 2,4);
//output: chen
?>
0x09：确定字符串出现的频率
复制代码 代码如下:
$talk=<<
our new product, extablishing a true synergy beteen the marketing
and product development teams. We'll own this space in thress months.
talk;
echo "
";
$sentencearray=explode(" ", $talk);
foreach ($sentencearray as $item)
{
echo "The word $item appears(".substr_count($talk, $item).")times
";
}
?>
0x10：用另一个字符串替换一个字符串的一部分
复制代码 代码如下:
$phonenum="15926841384";
echo "
".substr_replace($phonenum, "****", 3,4);
?>
