pg_unescape_bytea

    (PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

    pg_unescape_bytea — Unescape binary for bytea type

    Descrição

    pg_unescape_bytea(string$string): string

    pg_unescape_bytea() unescapes PostgreSQL bytea data values. It returns the unescaped string, possibly containing binary data.

    Nota:

    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.

    Parâmetros

    string

    A string containing PostgreSQL bytea data to be converted into a PHP binary string.

    Valor Retornado

    A string containing the unescaped data.

    Exemplos

    Exemplo #1 pg_unescape_bytea() example

    <?php
    // Connect to the database
    $dbconn = pg_connect('dbname=foo');

    // Get the bytea data
    $res = pg_query("SELECT data FROM gallery WHERE name='Pine trees'");
    $raw = pg_fetch_result($res, 'data');

    // Convert to binary and send to the browser
    header('Content-type: image/jpeg');
    echo     pg_unescape_bytea($raw);
    ?>

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