PHP. Руководство по PHP. 2005

pg_escape_bytea

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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.

Примеры

Пример 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}')";
?>

PHP. Руководство по PHP. 2005

pg_escape_bytea

Описание

Список параметров

Возвращаемые значения

Примеры

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