sqlite_create_function

Registers a "regular" User Defined Function for use in SQL statements (PHP 5, PECL pdo_sqlite:0.2-0.3 sqlite:1.0-1.0.3)
void sqlite_create_function ( resource dbhandle, string function_name, callback callback [, int num_args] )

Example 2324. sqlite_create_function() example

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<?php
function md5_and_reverse($string) 

{

    return strrev(md5($string));

}


if ($dbhandle = sqlite_open('mysqlitedb', 0666, $sqliteerror)) {

    

    sqlite_create_function($dbhandle, 'md5rev', 'md5_and_reverse', 1);

    

    $sql  = 'SELECT md5rev(filename) FROM files';

    $rows = sqlite_array_query($dbhandle, $sql);

} else {

    echo 'Error opening sqlite db: ' . $sqliteerror;

    exit;

}
?>

Example 2325. Example of using the PHP function

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<?php

$rows = sqlite_array_query($dbhandle, "SELECT php('md5', filename) from files");
?>

This example will call the md5() on each filename column in the database and return the result into $rows

Code Examples / Notes » sqlite_create_php

info

The function can be a method of a class: <?php class sqlite_function { function md5($value) { return md5($value); } } $dbhandle = sqlite_open('SQLiteDB'); sqlite_create_function($dbhandle, 'md5', array('sqlite_function', 'md5'), 1); // From now on, you can use md5 function inside your SQL statements ?> It works fine :)

brett

It appears that UDFs created by sqlite_create_function() do not work properly within INSERT or DELETE statements. A simplified INSERT example: <?php // SQLite UDF // Mimic MySQL FROM_UNIXTIME function function from_unixtime($unixtime) { return "'".date('Y-m-d H:i:s', $unixtime)."'"; } // ----------------------------------------------------------- // Open the database and create the UDF $handle = sqlite_open('db.sqlite', 0666); sqlite_create_function($handle, 'FROM_UNIXTIME', 'from_unixtime', 1); // Insert a row $sql = " INSERT INTO table (name, timestamp) VALUES ('Foo', FROM_UNIXTIME(".time()."); "; $result = sqlite_exec($handle, $sql); // Retrieve the row $sql = "SELECT * FROM table"; $result = sqlite_unbuffered_query($handle, $sql) $row = sqlite_fetch_all($result, SQLITE_ASSOC); // Dump print_r($row); ?> This will show: Array ( [0] => Array ( [name] => 'Foo' [timestamp] => -1 ) ) The expected result for timestamp would be something like '2005-05-20 10:00:00'

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sqlite_array_query
sqlite_busy_timeout
sqlite_changes
sqlite_close
sqlite_column
sqlite_create_aggregate
sqlite_create_function
sqlite_current
sqlite_error_string
sqlite_escape_string
sqlite_exec
sqlite_factory
sqlite_fetch_all
sqlite_fetch_array
sqlite_fetch_column_types
sqlite_fetch_object
sqlite_fetch_single
sqlite_fetch_string
sqlite_field_name
sqlite_has_more
sqlite_has_prev
sqlite_key
sqlite_last_error
sqlite_last_insert_rowid
sqlite_libencoding
sqlite_libversion
sqlite_next
sqlite_num_fields
sqlite_num_rows
sqlite_open
sqlite_popen
sqlite_prev
sqlite_query
sqlite_rewind
sqlite_seek
sqlite_single_query
sqlite_udf_decode_binary
sqlite_udf_encode_binary
sqlite_unbuffered_query
sqlite_valid