What method can php use to escape all special characters in a string?
Similar to mysql_real_escape_string, but this one is outdated and is not used on the database.
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How can PHP escape all special characters in a string?
Similar to mysql_real_escape_string, but this one is outdated and is not used on the database.
htmlspecialchars
The mysql extension is abandoned after PHP5.5, you can switch to mysqli or pdo_mysql
So the mysql_real_escape_string function you mentioned, if you use mysqli, you can use mysqli_real_escape_string instead
However, it is recommended to use pdo_mysql and use prepared statements to improve security
http://php.net/manual/zh/ref....
htmlspecialchars
Single and double quotes, greater than and less than signs, etc. are converted into HTML format;htmlentities
All characters are converted into HTML format;addslashes
Single and double quotes, backslashes and NULL plus backslash escape;
As other netizens said, if you use
pdo
, you don’t need to consider issues such as injection in database operations.pdo
’s built-in preprocessing can effectively preventsql
injection and the processing of special characters.If you don’t use
pdo
, then you have to do the filtering process yourself. Here is a method I recommend, for reference only
<code>function isEscape($val, $isboor = false) { if (! get_magic_quotes_gpc ()) { $val = addslashes ( $val ); } if ($isboor) { $val = strtr ( $val, array ( "%" => "\%", "_" => "\_" ) ); } return $val; }</code>

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