本文目录一览：
php超长文本截取函数
?php
function unhtml($content){
$content=htmlspecialchars($content);
$content=str_replace(chr(13),"br",$content);
$content=str_replace(chr(32),"br",$content);
$content=str_replace("[_[","",$content);
$content=str_relace(")_)","",$content);
$content=str_replace("|_|","",$content);
$search = array ("'script[^]*?.*?/script'si", // 去掉 javascript
"'[/!]*?[^]*?'si", // 去掉 HTML 标记
"'([rn])[s]+'", // 去掉空白字符
"'(quot|#34);'i", // 替换 HTML 实体
"'(amp|#38);'i",
"'(lt|#60);'i",
"'(gt|#62);'i",
"'(nbsp|#160);'i",
"'(iexcl|#161);'i",
"'(cent|#162);'i",
"'(pound|#163);'i",
"'(copy|#169);'i",
"'#(d+);'e","|'|isU",'|"|isU'); // 作为 PHP 代码运行
$replace = array ("",
"",
"\1",
""",
"",
"",
"",
" ",
chr(161),
chr(162),
chr(163),
chr(169),
"chr(\1)","","");
$content = preg_replace ($search, $replace, $content);
rerurn trim($content);
}
?
请教大家一个关于PHP搜索的问题
search.php文件中可以这样写（思路)
$sql=select * from zhigong where id1;("先写一个都允许查询的条件，方便下面连接sql语句")
if(!empty($_POST['a']) !is_null($_POST['a'])){
$xm=htmlspecialchars($_POST['a'])//简单的先防止sql注入
$sql.=" and xm='{$xm}'";
}
if(!empty($_POST['b']) !is_null($_POST['b'])){
$sj=htmlspecialchars($_POST['b'])//简单的先防止sql注入
$sql.=" and sj='{$sj}'";
}
if(!empty($_POST['d']) !is_null($_POST['d'])){
$xb=htmlspecialchars($_POST['d'])//简单的先防止sql注入
$sql.=" and xb='{$xb}'";
}
PHP preg_replace 重复内容的替换次数问题
你这不是已经写了函数吗?
function tihuan($abb,$d){
return preg_replace("/1/",$d,$abb,1);
}
这就是函数啊.
你可以改一下,把要查找的字符串也写成参数.
function tihuan($search,$to = '',$source_str,$times = 1){
if(empty($search)) return '';
if(empty($source_str)) return '';
return preg_replace($search,$to,$source_str,$times);
}