# pg_escape_bytea

(PHP 4 >= 4.2.0, PHP 5)

pg_escape_bytea — Escape a string for insertion into a bytea field

### Description

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.

### Parameters

`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.

### Return Values

A string containing the escaped data.

### ChangeLog

Version | Description
--- | ---
5.2.0 | `connection` added

### Examples

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}')");
?>`

### See Also

- pg_unescape_bytea()
- pg_escape_string()