pg_query

pg_query

Execute a query

 **pg_query** PgSql\Connection $connection string $query

executes the 

on the specified database . should be preferred in most cases. pg_query``query``connection``pg_query_params

If an error occurs, and false is returned, details of the error can be retrieved using the function if the connection is valid. pg_last_error

Opmerking: > Although can be omitted, it is not recommended, since it can be the cause of hard to find bugs in scripts. connection

Opmerking: > This function used to be called . is still available for compatibility reasons, but users are encouraged to use the newer name. pg_exec``pg_exec

connection``queryThe SQL statement or statements to be executed. When multiple statements are passed to the function, they are automatically executed as one transaction, unless there are explicit BEGIN/COMMIT commands included in the query string. However, using multiple transactions in one function call is not recommended.

Waarschuwing: > String interpolation of user-supplied data is extremely dangerous and is likely to lead to vulnerabilities. In most cases should be preferred, passing user-supplied values as parameters rather than substituting them into the query string. SQL injectionpg_query_params

    Any user-supplied data substituted directly into a query string should
    be .
   properly escaped

An instance on success, return.falseforfailure. PgSql\Result

Voorbeeld: example

<?php

$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
  echo "An error occurred.\n";
  exit;
}

$result = pg_query($conn, "SELECT author, email FROM authors");
if (!$result) {
  echo "An error occurred.\n";
  exit;
}

while ($row = pg_fetch_row($result)) {
  echo "Author: $row[0]  E-mail: $row[1]";
  echo "<br />\n";
}
 
?>

Voorbeeld: Using with multiple statements

<?php

$conn = pg_pconnect("dbname=publisher");

// these statements will be executed as one transaction

$query = "UPDATE authors SET author=UPPER(author) WHERE id=1;";
$query .= "UPDATE authors SET author=LOWER(author) WHERE id=2;";
$query .= "UPDATE authors SET author=NULL WHERE id=3;";

pg_query($conn, $query);

?>

pg_connect``pg_pconnect``pg_fetch_array``pg_fetch_object``pg_num_rows``pg_affected_rows