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- PHP常见错误,我认为主要分为3块:
- 1、语法错误
- Parse error: syntax error, unexpected T_VARIABLE in E:\guestbook\user.php on line 268
- 一般是少分号,在上一行或者下一行都有可能
- Parse error: syntax error, unexpected '.' in F:\www\blog\article.php on line 100
- 多个“.”,类似的还有多个“;”等等
- Notice: Undefined variable: a in ...
- 使用了一个没有被定义的变量a
- Parse error: syntax error, unexpected T_ELSE in
- if else if else 句式逻辑错误
- Parse error: syntax error, unexpected $end in
- 一般是大括号不匹配
- Parse error: syntax error, unexpected T_STRING in
- 一般是忘了写句末分号
- Warning: Invalid argument supplied for foreach() in
- foreach 的第一个参数必须是一个数组
- Warning: Wrong parameter count for a in
- 函数参数个数不对
- Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at F:\www\blog\index.php:10) in F:\www\blog\includes\config.inc.php on line 10
- Warning: annot modify header information - headers already sent by (output started at F:\www\blog\index.php:10) in F:\www\blog\includes\config.inc.php on line 12
- session前面不能有输出,同意的cookie也是这样的
- Fatal error: Cannot redeclare
- 函数已经定义过,不能重新再定义;类也不能同名
- 2、SQL语句错误
- Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in
- 说明前面执行SQL 返回失败,一般可能是SQL语句错误 ,如分析不出来,可以Mysql_error () 看具体是哪个地方错了
- No database selected
- 一般是没有连接数据库
- Warning: mysql_connect() [function.mysql-connect]: Access denied for user ‘root’@'localhost’ (using password: YES) in ….. on line 3Access denied for user ‘root’@'localhost’ (using password: YES)
- 数据库用户名的密码错误
- Unknown database ‘cms07261′
- 数据库不存在
- Table ‘cms0726.test’ doesn’t exist
- 表不存在
- Unknown column ‘abc’ in ‘field list’
- 字段不存在
- Column count doesn’t match value count at row 1
- sql语句中 字段值的个数比字段名个数不一样
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- 3、模板错误
- Fatal error: Smarty error: [in message_list.html line 22]: syntax error: ‘foreach: item’ must be a variable name (literal string)
- foreach 后面的item 后面必须跟一个变量名,不加$,是一个字符串
- Fatal error: Smarty error: [in admin/tpl/class_detail.html line 14]: syntax error: unrecognized tag: cs.student_id (Smarty_Compiler.class.php, line 436) in D:\www\web\xmphp\inc\smarty\Smarty.class.php on line 1088
- smarty语法错误:循环数组的时候,少$
- Warning: Smarty error: unable to read resource: “message_list1.html” in
- 模板文件找不到,看是否是文件名写错或文件存放到别的目录中去了。
- Fatal error: Smarty error: [in order_detail.html line 171]: syntax error: unclosed tag \{elseif} (opened line 157). (Smarty_Compiler.class.php, line 317) in F:\www\guestbook\xmphp\inc\smarty\Smarty.class.php on line 1088
- html页面语法错误,少结束标签<%/if%>
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