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PHP Built-in String Validation Functions

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Aung Khant
Aung Khant

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PHP5 Built-in String Filter Functions For Your Application Security By d0ubl3_h3lix http://yehg.org April 2008
Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object]
Why We Use? ,[object Object],[object Object],[object Object],[object Object]
Need to Know ,[object Object],[object Object],[object Object],[object Object]
Secure Practice ,[object Object],[object Object],[object Object],[object Object]
Validation Vs Sanization ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
htmlspecialchars ,[object Object],[object Object]
Quote_Style ,[object Object],[object Object],[object Object],[object Object],[object Object]
Supported Charsets ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],Example
htmlentities ,[object Object],[object Object]
Example ,[object Object],[object Object],[object Object],[object Object],[object Object]
htmlspecialchars vs htmlentities ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
[object Object],[object Object],strip_tags
[object Object],[object Object],[object Object],[object Object],[object Object],Example: Stripping HTML
[object Object],[object Object],[object Object],Example: Stripping PHP
 
escapeshellcmd ,[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],Example
 
[object Object],[object Object],mysql_real_escape_string
mysql_escape_string ,[object Object],[object Object]
 
is_* Functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
is_* Functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Good Practice With is_* ,[object Object],[object Object],[object Object]
 
filter_* Functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filterable Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Options ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object]
Filter Definitions ,[object Object],[object Object]
Filter Definitions ,[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
Filter Definitions ,[object Object],[object Object]
Filter Definitions ,[object Object],[object Object],[object Object]
 
Remind: filter_* Functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],filter_has_var
Example ,[object Object],[object Object],[object Object]
[object Object],[object Object],filter_id
[object Object],[object Object],filter_list
[object Object],[object Object],filter_input
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Example
[object Object],[object Object],filter_input_array
[object Object],Example
[object Object],[object Object],[object Object],[object Object],Example
[object Object],[object Object],[object Object],[object Object],Example
No Real Difference! ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],filter_var
[object Object],[object Object],[object Object],Example
[object Object],[object Object],filter_var_array
[object Object],Example
[object Object],[object Object],[object Object],[object Object],Example
[object Object],[object Object],[object Object],[object Object],Example
[object Object],[object Object]
First .. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Second … ,[object Object],[object Object],[object Object]
[object Object]
Reference ,[object Object]

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PHP Built-in String Validation Functions

  • 1. PHP5 Built-in String Filter Functions For Your Application Security By d0ubl3_h3lix http://yehg.org April 2008
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