PHP 5.4.36 Released

sqlite_escape_string

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

sqlite_escape_stringEscapes a string for use as a query parameter

Description

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).

Parameters

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.

Return Values

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

Notes

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.

See Also

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User Contributed Notes 4 notes

up
3
carlo_greco at live dot it
5 years ago
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")
?>
up
2
soletan at toxa dot de
9 years ago
@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.
up
0
10 years ago
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;
}
?>
up
-1
jwzumwalt at neatinfo dot com
3 years ago
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>
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