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  • pg_escape_literal()

    (PHP 5 >= 5.4.4, PHP 7)

    Escape a literal for insertion into a text field

    说明

    pg_escape_literal([resource $connection],string $data): string

    pg_escape_literal() escapes a literal for querying the PostgreSQL database. It returns an escaped literal in the PostgreSQL format.pg_escape_literal() adds quotes before and after data. Users should not add quotes. Use of this function is recommended instead of pg_escape_string(). If the type of the column is bytea,pg_escape_bytea() must be used instead. For escaping identifiers(e.g. table, field names),pg_escape_identifier() must be used.

    Note:

    This function has internal escape code and can also be used with PostgreSQL 8.4 or less.

    参数

    $connection

    PostgreSQL database connection resource. When$connectionis not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect(). When there is no default connection, it raisesE_WARNINGand returns FALSE.

    $data

    A string containing text to be escaped.

    返回值

    A string containing the escaped data.

    范例

    Example #1 pg_escape_literal() example

    <?php 
      // Connect to the database
      $dbconn = pg_connect('dbname=foo');
      
      // Read in a text file (containing apostrophes and backslashes)
      $data = file_get_contents('letter.txt');
      
      // Escape the text data
      $escaped = pg_escape_literal($data);
      
      // Insert it into the database. Note that no quotes around {$escaped}
      pg_query("INSERT INTO correspondence (name, data) VALUES ('My letter', {$escaped})");
    ?>
    

    参见