<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}知识点:
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}1、过滤函数缺陷绕过
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}2、学习知识点的作用
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}
- <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}CTF考点
- <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}代码审计
php函数特性知识点讲解
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}1、== <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}和 <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}===对比
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}
复制代码 <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}==
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}- <?php
- header("Content-Type:text/html;charset=utf-8");
- $flag = '小迪师傅--yyds';
-
- $a=1;
- if($a==$_GET['x']){
- echo $flag;
- }
复制代码
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}语法
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
} <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
} <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}strpos(string,find,start)
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
} <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}参数描述string必需。规定要搜索的字符串。find必需。规定要查找的字符串。start可选。规定在何处开始搜索。返回值
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
} <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
} <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}返回字符串在另一字符串中第一次出现的位置,如果没有找到字符串则返回 <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}FALSE。
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
} <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}注释:字符串位置从 <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}0 <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}开始,不是从 <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}1 <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}开始。
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
} <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}- [/code] <?php
- header("Content-Type:text/html;charset=utf-8");
- $flag = '小迪师傅--yyds';
-
- $a=1;
- if($a==$_GET['x']){
- echo $flag;
- }[size=4]语法[/size]
- <?php
- header("Content-Type:text/html;charset=utf-8");
- $flag = '小迪师傅--yyds';
-
- $a=1;
- if($a==$_GET['x']){
- echo $flag;
- } <?php
- header("Content-Type:text/html;charset=utf-8");
- $flag = '小迪师傅--yyds';
-
- $a=1;
- if($a==$_GET['x']){
- echo $flag;
- } <?php
- header("Content-Type:text/html;charset=utf-8");
- $flag = '小迪师傅--yyds';
-
- $a=1;
- if($a==$_GET['x']){
- echo $flag;
- }[code] <?php
- header("Content-Type:text/html;charset=utf-8");
- $flag = '小迪师傅--yyds';
-
- $a='1';
- if($a===$_GET['y']){
- echo $flag;
- }
复制代码
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
} <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}参数描述find必需。规定要查找的值。replace必需。规定替换 <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}find <?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}中的值的值。string必需。规定被搜索的字符串。count可选。一个变量,对替换数进行计数。
<?php
header("Content-Type:text/html;charset=utf-8");
$flag = '小迪师傅--yyds';
$a=1;
if($a==$_GET['x']){
echo $flag;
}[code] |