pg_delete
(PHP 4 >= 4.3.0, PHP 5, PHP 7)
pg_delete — Deletes records
Description
$connection
, string $table_name
, array $assoc_array
[, int $options = PGSQL_DML_EXEC
] ) : mixed
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.
If options is specified, pg_convert() is applied to assoc_array with the specified flags.
By default pg_delete() passes raw values. Values must be escaped or PGSQL_DML_ESCAPE option must be specified. PGSQL_DML_ESCAPE quotes and escapes paramters/identifiers. Therefore, table/column names became case sensitive.
Note that neither escape nor prepared query can protect LIKE query, JSON, Array, Regex, etc. These parameters should be handled according to their contexts. i.e. Escape/validate values.
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 somewhat, since all values are escaped.
// However PostgreSQL supports JSON/Array. These are not
// safe by nither escape nor prepared query.
$res = pg_delete($db, 'post_log', $_POST);
if ($res) {
echo "POST data is deleted: $res\n";
} else {
echo "User must have sent wrong inputs\n";
}
?>
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.
|
English translation
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Document created the 30/01/2003, last modified the 26/10/2018
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References
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