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Escape a string for insertion into a bytea field


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}')");
?>

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