06-14-2005
Quote:
Originally Posted by yongho
Question: I just started learning shell scripting a few days ago and I was under the assumption that you didn't need to typeset anything.
you don't.
if you
don't,
count=$((count + 1))
becomes
count=$((
$count + 1))
Quote:
Originally Posted by yongho
One of my previous counters looked like this (in a while statement, not an if statement:
var1=`expr $var1 + $var2`
..and it worked.
this
NOT using ksh/bash
builtin capabilities for doing simple integer math.
Quote:
Originally Posted by yongho
But when I tried the expr command in the if statement, it didn't increment at all. Would you know why this is? Could it be because once you enter an if statement, you must use different rules?
nope, that's not it.
are you saying that the 'expr ' increment
did not work, but the 'count=$((count+1))'
did?
there must be something else different in your 'while' loop.
is your 'while' loopbeing
piped with data?
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LEARN ABOUT PHP
pdostatement.bindvalue
PDOSTATEMENT.BINDVALUE(3) 1 PDOSTATEMENT.BINDVALUE(3)
PDOStatement::bindValue - Binds a value to a parameter
SYNOPSIS
public bool PDOStatement::bindValue (mixed $parameter, mixed $value, [int $data_type = PDO::PARAM_STR])
DESCRIPTION
Binds a value to a corresponding named or question mark placeholder in the SQL statement that was used to prepare the statement.
PARAMETERS
o $parameter
- Parameter identifier. For a prepared statement using named placeholders, this will be a parameter name of the form $:name. For a
prepared statement using question mark placeholders, this will be the 1-indexed position of the parameter.
o $value
- The value to bind to the parameter.
o $data_type
- Explicit data type for the parameter using the PDO::PARAM_* constants.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
Execute a prepared statement with named placeholders
<?php
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < :calories AND colour = :colour');
$sth->bindValue(':calories', $calories, PDO::PARAM_INT);
$sth->bindValue(':colour', $colour, PDO::PARAM_STR);
$sth->execute();
?>
Example #2
Execute a prepared statement with question mark placeholders
<?php
/* Execute a prepared statement by binding PHP variables */
$calories = 150;
$colour = 'red';
$sth = $dbh->prepare('SELECT name, colour, calories
FROM fruit
WHERE calories < ? AND colour = ?');
$sth->bindValue(1, $calories, PDO::PARAM_INT);
$sth->bindValue(2, $colour, PDO::PARAM_STR);
$sth->execute();
?>
SEE ALSO
PDO.prepare(3), PDOStatement.execute(3), PDOStatement.bindParam(3).
PHP Documentation Group PDOSTATEMENT.BINDVALUE(3)