PHP: cannot pass single quoted string to mysqli query -


this question has answer here:

i fighting hours thing:

$var=var;     $result = "select column1, column2 $db column3 = '$var' ";

the error is: have error in sql syntax; check manual corresponds mysql server version right syntax use near '\'var\'' @ line 1

names correct, works in mysql query. think tried possible quoting options, wrong?

update: requested used escaping, error remains same

$var=var;    $var = $conn->real_escape_string($var); $result = "select column1, column2 {$db} column3 = '{$var}' ";

there must 

$var = $mysqli->real_escape_string($var); $sql = "select column1, column2 {$db} column3 = '{$var}' ";

instead of:

$result = "select column1, column2 $db column3 = '$var' "; $result = $mysqli->real_escape_string($result) ; //totally wrong.

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