(PHP 4, PHP 5, PHP 7, PHP 8)
pg_fetch_row — 提取一行作为枚举数组
pg_fetch_row() 根据指定 result 实例提取一行数据（记录）作为数组返回。每个得到的列依次存放在数组中，偏移量从 0 开始。
注意: 此函数将 NULL 字段设置为 PHP
null值。
resultPgSql\Result 实例，由 pg_query()、pg_query_params() 或者 pg_execute()（等）返回。
row
要获取的结果中的行号。行从 0 向上编号。如果省略或为 null，则获取下一行。
mode
An optional parameter that controls how the returned array is indexed.
mode is a constant and can take the following values:
PGSQL_ASSOC, PGSQL_NUM and PGSQL_BOTH.
Using PGSQL_NUM, the function will return an array with numerical indices,
using PGSQL_ASSOC it will return only associative indices
while PGSQL_BOTH will return both numerical and associative indices.
| 版本 | 说明 |
|---|---|
| 8.1.0 |
现在 result 参数接受 PgSql\Result
实例，之前接受 resource。
|
示例 #1 pg_fetch_row() 示例
<?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";
}
?>
I wondered whether array values of PostgreSQL are converted to PHP arrays by this functions. This is not the case, they are stored in the returned array as a string in the form "{value1 delimiter value2 delimiter value3}" (See http://www.postgresql.org/docs/8.0/interactive/arrays.html#AEN5389).Note, that when you retrieve some PG boolean value, you get 't' or 'f' characters which are not compatible with PHP bool.pg_fetch_row is faster than pg_fetch_assoc when doing a query with * as the select parameter. Otherwise, with declared columns, the two are similar in speed.a way to do this with 2 loops to insert data into a table...
$num = pg_numrows($result);
$col_num = pg_numfields($result);
for ($i=0; $i<$num; $i++) {
$line = pg_fetch_array($result, $i, PGSQL_ASSOC);
print "\t<tr bgcolor=#dddddd>\n";
for ($j=0; $j<$col_num; $j++){
list($col_name, $col_value) =each($line);
print "\t\t<TD ALIGN=RIGHT><FONT SIZE=1 FACE='Geneva'>$col_value</FONT></TD>\n";
}
echo "<br>";
}Note that the internal row counter is incremented BEFORE the row is retrieved. This causes an off by one error if you try to do:
pg_result_seek($resid,0);
pg_fetch_row($resid);
you will get back the SECOND result not the FIRST.