PHP Escape character

Source: Internet
Author: User
Many times, some text is fetched from a third party, and an escape error occurs. Now summarize some of the escape functions that PHP comes with, as shown in

Name of function

Interpretation

Introduced

Htmlspecialchars

Combine with, single double quotes, greater than, and less than sign into HTML format

& Turn Into &
"Turn into"
' Turn into '
<>
> Turn into >

Htmlentities ()

All characters are converted to HTML format

In addition to the above Htmlspecialchars characters, the double-byte characters are displayed as encodings.

Addslashes

Single double quote, backslash, and null plus backslash escape

The characters that are changed include single quotation marks ('), double quotation marks ("), backslash backslash (\), and null character null.

Stripslashes

Remove backslash characters

Removes the backslash character from the string. If you have two consecutive backslashes, remove one and leave one. If there is only one backslash, remove it directly.

Quotemeta

Add Reference symbol

The string that contains the. \\ + * ? [ ^ ] ($) to precede the character with the backslash "\" symbol.

NL2BR ()

Converts a newline character to

Strip_tags

Remove HTML and PHP tags

Remove any HTML tags and PHP tags from the string, including the content between tags blocking. Note that if there is an error in the string HTML and PHP tags, an error will also be returned.

Mysql_real_escape_string

Escaping special characters in SQL strings

Escaped \x00 \ r \ n space \ ' "\x1a, which is useful for multibyte character processing. Mysql_real_escape_string will judge the character set, mysql_escape_string do not consider it.

Base64_decode

Base64 decoding

Decoding data encoded with MIME base64

Base64_encode

Base64 encoding

Encode data using MIME base64

UrlDecode

URL decoding

Decodes an encoded URL string

UrlEncode

URL encoding

Encoded URL string

'). addclass (' pre-numbering '). Hide (); $ (this). addclass (' has-numbering '). Parent (). append ($numbering); for (i = 1; i <= lines; i++) {$numbering. Append ($ ('
  • '). Text (i)); }; $numbering. FadeIn (1700); }); });

    The above describes the PHP escape character, including the contents of the content, I hope that the PHP tutorial interested in a friend helpful.

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