07-13-2011
Need to filter data from a file
Hi,
I have a file with hundreds of records.
There are four fields on each line, separated by semicolons.
Name
Height (meters)
Country
Continent (Africa,Asia,Europe,North America,Oceania,South
America,The Poles)
I need to Write the command to find display how many mountains appear in
the list on each continent , like this:
30 Africa
144 Asia
91 Europe
163 North America
11 Oceania
116 South America
3 The Poles
I know I can count it by using Grep and filters but I will need one command per continent. How do I use a single command to list down the output in this format?
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LEARN ABOUT PHP
mysqli_stmt_get_result
MYSQLI_STMT_GET_RESULT(3) 1 MYSQLI_STMT_GET_RESULT(3)
mysqli_stmt::get_result - Gets a result set from a prepared statement
Object oriented style
SYNOPSIS
mysqli_result mysqli_stmt::get_result (void )
DESCRIPTION
Procedural style
mysqli_result mysqli_stmt_get_result (mysqli_stmt $stmt)
Call to return a result set from a prepared statement query.
PARAMETERS
o $
stmt -Procedural style only: A statement identifier returned by mysqli_stmt_init(3).
RETURN VALUES
Returns a resultset or FALSE on failure.
MYSQL NATIVE DRIVER ONLY
Available only with mysqlnd.
EXAMPLES
Example #1
Object oriented style
<?php
$mysqli = new mysqli("127.0.0.1", "user", "password", "world");
if($mysqli->connect_error)
{
die("$mysqli->connect_errno: $mysqli->connect_error");
}
$query = "SELECT Name, Population, Continent FROM Country WHERE Continent=? ORDER BY Name LIMIT 1";
$stmt = $mysqli->stmt_init();
if(!$stmt->prepare($query))
{
print "Failed to prepare statement
";
}
else
{
$stmt->bind_param("s", $continent);
$continent_array = array('Europe','Africa','Asia','North America');
foreach($continent_array as $continent)
{
$stmt->execute();
$result = $stmt->get_result();
while ($row = $result->fetch_array(MYSQLI_NUM))
{
foreach ($row as $r)
{
print "$r ";
}
print "
";
}
}
}
$stmt->close();
$mysqli->close();
?>
Example #2
Procedural style
<?php
$link = mysqli_connect("127.0.0.1", "user", "password", "world");
if (!$link)
{
$error = mysqli_connect_error();
$errno = mysqli_connect_errno();
print "$errno: $error
";
exit();
}
$query = "SELECT Name, Population, Continent FROM Country WHERE Continent=? ORDER BY Name LIMIT 1";
$stmt = mysqli_stmt_init($link);
if(!mysqli_stmt_prepare($stmt, $query))
{
print "Failed to prepare statement
";
}
else
{
mysqli_stmt_bind_param($stmt, "s", $continent);
$continent_array = array('Europe','Africa','Asia','North America');
foreach($continent_array as $continent)
{
mysqli_stmt_execute($stmt);
$result = mysqli_stmt_get_result($stmt);
while ($row = mysqli_fetch_array($result, MYSQLI_NUM))
{
foreach ($row as $r)
{
print "$r ";
}
print "
";
}
}
}
mysqli_stmt_close($stmt);
mysqli_close($link);
?>
The above examples will output:
Albania 3401200 Europe
Algeria 31471000 Africa
Afghanistan 22720000 Asia
Anguilla 8000 North America
SEE ALSO
mysqli_prepare(3), mysqli_stmt_result_metadata(3), mysqli_stmt_fetch(3), mysqli_fetch_array(3), mysqli_stmt_store_result(3).
PHP Documentation Group MYSQLI_STMT_GET_RESULT(3)