pg_delete
(PHP 4 >= 4.3.0, PHP 5)
pg_delete — Deletes records
Description
$connection
, string $table_name
, array $assoc_array
[, int $options = PGSQL_DML_EXEC
] )
pg_delete() deletes records from a table specified by
the keys and values in assoc_array. If options is
specified, pg_convert() is applied
to assoc_array with the specified options.
Parameters
-
connection -
PostgreSQL database connection resource.
-
table_name -
Name of the table from which to delete rows.
-
assoc_array -
An array whose keys are field names in the table
table_name, and whose values are the values of those fields that are to be deleted. -
options -
Any number of
PGSQL_CONV_FORCE_NULL,PGSQL_DML_NO_CONV,PGSQL_DML_ESCAPE,PGSQL_DML_EXEC,PGSQL_DML_ASYNCorPGSQL_DML_STRINGcombined. IfPGSQL_DML_STRINGis part of theoptionsthen query string is returned. WhenPGSQL_DML_NO_CONVorPGSQL_DML_ESCAPEis set, it does not call pg_convert() internally.
Return Values
Returns TRUE on success or FALSE on failure. Returns string if PGSQL_DML_STRING is passed
via options.
Examples
Example #1 pg_delete() example
<?php
$db = pg_connect('dbname=foo');
// This is safe, since $_POST is converted automatically
$res = pg_delete($db, 'post_log', $_POST);
if ($res) {
echo "POST data is deleted: $res\n";
} else {
echo "User must have sent wrong inputs\n";
}
?>
This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.
Changelog
| Version | Description |
|---|---|
| 5.6.0 |
No longer experimental. Added PGSQL_DML_ESCAPE constant,
TRUE/FALSE and NULL data type support.
|
| 5.5.3/5.4.19 |
Direct SQL injection to table_name and Indirect SQL
injection to identifiers are fixed.
|
- PHP Руководство
- Функции по категориям
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- Расширения для работы с базами данных
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- PostgreSQL
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Коментарии
One should take care when checking the return value.
0 == false which is not equal with failed delete.
if(!$res)
echo "Nothing was deleted";