pg_escape_literal
(PHP 5 >= 5.4.4, PHP 7)
pg_escape_literal — Escape a literal for insertion into a text field
说明
$connection ],
string $data ) :
string
pg_escape_literal() escapes a literal for querying the PostgreSQL database. It returns an escaped literal in the PostgreSQL format. pg_escape_literal() adds quotes before and after data. Users should not add quotes. Use of this function is recommended instead of pg_escape_string(). If the type of the column is bytea, pg_escape_bytea() must be used instead. For escaping identifiers (e.g. table, field names), pg_escape_identifier() must be used.
Note:
This function has internal escape code and can also be used with PostgreSQL 8.4 or less.
参数
-
connection -
PostgreSQL database connection resource. When
connectionis not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect(). When there is no default connection, it raises E_WARNING and returnsFALSE. -
data -
A string containing text to be escaped.
返回值
A string containing the escaped data.
范例
Example #1 pg_escape_literal() example
<?php
// Connect to the database
$dbconn = pg_connect('dbname=foo');
// Read in a text file (containing apostrophes and backslashes)
$data = file_get_contents('letter.txt');
// Escape the text data
$escaped = pg_escape_literal($data);
// Insert it into the database. Note that no quotes around {$escaped}
pg_query("INSERT INTO correspondence (name, data) VALUES ('My letter', {$escaped})");
?>
参见
- pg_escape_identifier() - Escape a identifier for insertion into a text field
- pg_escape_bytea() - 转义 bytea 类型的二进制数据
- pg_escape_string() - 转义 text/char 类型的字符串
