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pg_escape_bytea

(PHP 4 >= 4.2.0, PHP 5)

pg_escape_bytea - Escape a string for insertion into a bytea field

Описание

string pg_escape_bytea ( string data )

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

Замечание: 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.

Список параметров

data

A string containing text or binary data to be inserted into a bytea column.

Возвращаемые значения

A string containing the escaped data.

Примеры

Пример 1. pg_escape_bytea() example
  // 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}')");

Смотрите также: pg_unescape_bytea(), pg_escape_string().

Все функции PostgreSQL
Описание на ru2.php.net
Описание на php.ru

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