<html><head><title>正则表达式</title></head><body><a href="./">返回列表</a><br><form action="<?echo $PHP_SELF;?>" method="post">在<input type="text" name="string" value="<?echo $string;?>">中查找<input type="text" name="query" value="<?echo $query;?>"><br><input type="radio" name="where" value="" <?if(!isset($where) or $where=="") echo "checked";?>>第二个字符串可以在第一个字符串的任何位置<br><input type="radio" name="where" value="^" <?if(isset($where) and $where=="^") echo "checked";?>>第一个字符串以第二个字符串开始<br><input type="radio" name="where" value="$" <?if(isset($where) and $where=="$") echo "checked";?>>第一个字符串以第二个字符串结束<br><input type="checkbox" name="case" value="case" <?if(isset($case)) echo "checked";?>>区分大小写<br><input type="submit" value="查询"></form><?if(isset($string) and isset($query) and $string<>"" and $query<>""){
if(isset($case)){
$func = "ereg";
}
else{
$func = "eregi";
}
switch($where){
case "^":
$query = "^" . $query;
break;
case "$":
$query .= "$";
break;
}
eval("$found = $func("$query","$string");");
if($found){
echo "找到！";
}
else{
echo "未找到！";
}}?></body></html>
