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(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_update — 更新表
$connection,$table_name,$data,$condition,$options = PGSQL_DML_EXEC
pg_update() 用 condition 作为条件查询数据库，用 data 中的数据更新符合条件的记录。如果指定了 options，则 pg_convert() 会按照指定选项作用到 data 上。
此函数是实验性的。此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担。
connection
PostgreSQL database connection resource.
table_name
Name of the table into which to update rows.
data
An array whose keys are field names in the table table_name,
and whose values are what matched rows are to be updated to.
condition
An array whose keys are field names in the table table_name,
and whose values are the conditions that a row must meet to be updated.
options
Any number of PGSQL_CONV_OPTS,
PGSQL_DML_NO_CONV,
PGSQL_DML_EXEC or
PGSQL_DML_STRING combined. If PGSQL_DML_STRING is part of the
options then query string is returned.
成功时返回 true， 或者在失败时返回 false。 Returns string if PGSQL_DML_STRING is passed
via options.
示例 #1 pg_update() example
<?php
$db = pg_connect('dbname=foo');
$data = array('field1'=>'AA', 'field2'=>'BB');
// This is safe, since $_POST is converted automatically
$res = pg_update($db, 'post_log', $_POST, $data);
if ($res) {
echo "Data is updated: $res\n";
} else {
echo "User must have sent wrong inputs\n";
}
?>
