pg_escape_literal()

(PHP 5 >= 5.4.4, PHP 7)

Escape a literal for insertion into a text field

说明

pg_escape_literal([resource $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 raisesE_WARNINGand returns FALSE.
$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