php提交表单内容有单引号,mysql执行时遇见错误的解决方法。
首先看一下问题所在。 INSERT INTO tg_article( tg_username, tg_type, tg_title, tg_content, tg_date ) VALUES( '{$_clean['username']}', '{$_clean['type']}', '{$_clean['title']}', '{$_clean['content']}', NOW() ) 大家会发现党要提交的内容还有单引
首先看一下问题所在。
"INSERT INTO tg_article(
tg_username,
tg_type,
tg_title,
tg_content,
tg_date
)
VALUES(
'{$_clean['username']}',
'{$_clean['type']}',
'{$_clean['title']}',
'{$_clean['content']}',
NOW()
)
"
大家会发现党要提交的内容还有单引号的时候,value是里面就会出现单引号套单引号,这是明显的错误,这也是在网站开发中经常遇到的现象和易忽略的问题。接下来给大家讲怎么解决。
1. 对于magic_quotes_gpc=on的情况,
我们可以不对输入和输出数据库的字符串数据作
addslashes()和stripslashes()的操作,数据也会正常显示。
如果此时你对输入的数据作了addslashes()处理,
那么在输出的时候就必须使用stripslashes()去掉多余的反斜杠。
2. 对于magic_quotes_gpc=off 的情况
必须使用addslashes()对输入数据进行处理,但并不需要使用stripslashes()格式化输出
因为addslashes()并未将反斜杠一起写入数据库,只是帮助mysql完成了sql语句的执行。
创建一个转义函数,并对内容转义
function _mysql_string($_string){ //get_magic_quotes_gpc()如果开启状态就不用转义,否则要z转义 // if(!GPC){ // return @mysql_escape_string($_string); // }else{ //return $_string; // } if(GPC){ if(is_array($_string)){ foreach ($_string as $_key=>$_value){ $_string[$_key] = _mysql_string($_value); $_string[$_key] = addslashes($_string[$_key]); } }else{ $_string = @mysql_real_escape_string($_string); } } return $_string; }
//接受内容 $_clean = array(); $_clean['username'] = $_COOKIE['username']; $_clean['type'] = $_POST['type']; $_clean['title'] = $_POST['title']; $_clean['content'] = $_POST['content']; _mysql_string($_clean);

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