PG_ESCAPE_BYTEA(3) PG_ESCAPE_BYTEA(3)
pg_escape_bytea - Escape a string for insertion into a bytea field
SYNOPSIS
string pg_escape_bytea ([resource $connection], string $data)
DESCRIPTION
pg_escape_bytea(3) escapes string for bytea datatype. It returns escaped string.
Note
When you SELECT a bytea type, PostgreSQL returns octal byte values prefixed with '' (e.g. 32). Users are supposed to convert
back to binary format manually.
This function requires PostgreSQL 7.2 or later. With PostgreSQL 7.2.0 and 7.2.1, bytea values must be cast when you enable multi-
byte support. i.e. INSERT INTO test_table (image) VALUES ('$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
o $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(3) or pg_pconnect(3).
o $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(3) 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(3), pg_escape_string(3).
PHP Documentation Group PG_ESCAPE_BYTEA(3)
