php 한글 메뉴얼 도움말 검색 사이트 Escape a string for insertion into a bytea field [function.pg-escape-bytea]

설명

string pg_escape_bytea ([ resource $connection ], string $data )

pg_escape_bytea() escapes string for bytea datatype. It returns escaped string.

Note:
When you SELECT a bytea type, PostgreSQL returns octal byte values prefixed with '\' (e.g. \032). Users are supposed to convert back to binary format manually.

This function requires PostgreSQL 7.2 or later. With PostgreSQL 7.2.0 and 7.2.1, bytea values must be cast when you enable multi-byte support. i.e. INSERT INTO test_table (image) VALUES ('$image_escaped'::bytea); PostgreSQL 7.2.2 or later does not need a cast. The exception is when the client and backend character encoding does not match, and there may be multi-byte stream error. User must then cast to bytea to avoid this error.

인수

connection: PostgreSQL database connection resource. When connection is not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().
data: A string containing text or binary data to be inserted into a bytea column.

반환값

A string containing the escaped data.

변경점

버전	설명
5.2.0	`connection` added

예제

Example #1 pg_escape_bytea() example


<?php 
  // Connect to the database
  $dbconn = pg_connect('dbname=foo');
  
  // Read in a binary file
  $data = file_get_contents('image1.jpg');
  
  // Escape the binary data
  $escaped = pg_escape_bytea($data);
  
  // Insert it into the database
  pg_query("INSERT INTO gallery (name, data) VALUES ('Pine trees', '{$escaped}')");
?>

참고

pg_unescape_bytea() - Unescape binary for bytea type
pg_escape_string() - Escape a string for query