SQLite 函数
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sqlite_escape_string

(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0)

sqlite_escape_stringEscapes a string for use as a query parameter

说明

string sqlite_escape_string ( string $item )

sqlite_escape_string() will correctly quote the string specified by item for use in an SQLite SQL statement. This includes doubling up single-quote characters (') and checking for binary-unsafe characters in the query string.

Although the encoding makes it safe to insert the data, it will render simple text comparisons and LIKE clauses in your queries unusable for the columns that contain the binary data. In practice, this shouldn't be a problem, as your schema should be such that you don't use such things on binary columns (in fact, it might be better to store binary data using other means, such as in files).

参数

item

The string being quoted.

If the item contains a NUL character, or if it begins with a character whose ordinal value is 0x01, PHP will apply a binary encoding scheme so that you can safely store and retrieve binary data.

返回值

Returns an escaped string for use in an SQLite SQL statement.

注释

Note: Do not use this function to encode the return values from UDF's created using sqlite_create_function() or sqlite_create_aggregate() - use sqlite_udf_encode_binary() instead.

Warning

addslashes() should NOT be used to quote your strings for SQLite queries; it will lead to strange results when retrieving your data.

参见


SQLite 函数
在线手册:中文  英文

用户评论:

jwzumwalt at neatinfo dot com (2011-12-10 10:29:00)

sqlite_escape_string() does not catch all HTML characters that may  
conflict with a browser display. Notice the difference with the 
custom routine below

<?php
# php lib command
$str "Advoid! /slashes\, 'single' and these <too>";
$str sqlite_escape_string($str);
echo 
"<br>$str<br>";

# custom function
$str "Advoid! /slashes\, 'single' and these <too>";
$str clean($str);
echo 
"<br>$str<br>";

function 
clean($str) {
  
$search  = array('&'    '"'     "'"    '<'   '>'    );
  
$replace = array('&amp;''&quot;''&#39;''&lt;''&gt;' );

  
$str str_replace($search$replace$str);
  return 
$str;
}
?>

Output:
Advoid! /slashes\, "single" and these 
Advoid! /slashes\, 'single' and these <too>

carlo_greco at live dot it (2009-12-12 09:06:05)

You can try this (it works with strings and arrays):

<?php
// oop

class sqlite extends SQLiteDatabase {
    public function 
escape($data) {
        if(
is_array($data))
            return 
array_map("sqlite_escape_string"$data);

        return 
sqlite_escape_string($data);
    }
}

$db = new sqlite("dbname");
$values = array("hell'o""he'y");
$values $db->escape($values); // returns array("hell''o", "hey''y")

// procedural

function sqlite_myescape($data) {
    if(
is_array($data))
        return 
array_map("sqlite_escape_string"$data);

    return 
sqlite_escape_string($data);
}

$values = array("hell'o""he'y");
$values sqlite_myescape($values); // returns array("hell''o", "hey''y")
?>

soletan at toxa dot de (2005-03-29 04:19:28)

@minots: simplify what you are doing:

<?php

function sqlite_escape_array( &$arr ) {

  
$invalid = array( 'argv''argc' );

  foreach ( 
$arr as $key => $val )
     if ( ( 
strtoupper$key ) != $key ) && !is_numeric$key ) && !in_array$key$invalid ) ) {
       if ( 
is_string$val ) )
           
$arr[$key] = sqlite_escape_string$val );
       else if ( 
is_array$val ) )
           
sqlite_escape_array$arr[$key] );
     }

  return 
$arr;
}

?>

I'm not sure if the condition is equivalent to yours, but this excludes any numeric key, any completely uppercase'd keys and some selected (argc and argv) special keys. In case of never passing $GLOBALS or $_SERVER as argument one might shorten everything to this as a "pipelined" version:

<?php

function sqlite_escape_array$arr ) {

  foreach ( 
$arr as $key => $val )

    if ( 
is_string$val ) )
      
$arr[$key] = sqlite_escape_string$val );

    else if ( 
is_array$val ) )
      
$arr[$key] = sqlite_escape_array$val );

  return 
$arr;

}

?>

PHP's syntax is more powerful than those of many other languages, even when it's supporting their one's as well.

(2004-03-29 01:03:23)

sometimes i you have to escape an array instead of a string.
my function to do it works like:
array sqlite_escape_array ( &array string)

<?php
function sqlite_escape_array(&$arr)
{
  while ( list(
$key$val) = each($arr) ):
    if ( (
strtoupper($key)!=$key OR "".intval($key) == "$key") && $key!="argc" and $key!="argv"):
        if (
is_string($val)):
            
$arr[$key]=sqlite_escape_string($val);
        endif;
        if (
is_array($val)):
            
$arr[$key]=sqlite_escape_array($val);
        endif;
    endif;
  endwhile;
  return 
$arr;
}
?>

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