Mysql will then perform its own conversions with values it receives from PHP on execute. The value will then be automatically cast to string on the back-end before being passed to the Mysql engine. i.e.:ģ) You can default to 's' for most parameter arguments in most cases. This means that keeping in mind precision limits and avoiding manually casting the variable to (int) first, you can still use the 'i' binding type for larger numbers. i.e.:Ģ) Though PHP numbers cannot be reliably cast to (int) if larger than PHP_INT_MAX, behind the scenes, the value will be converted anyway to at most long long depending on the size. Re-assigning every single value explicitly keeps the references aliveīlob and null handling aside, a couple of notes on how param values are automatically converted and forwarded on to the Mysql engine based on your type string argument:ġ) PHP will automatically convert the value behind the scenes to the underlying type corresponding to your binding type string. Re-assigning the array in the while()-head generates a new array, whereas references from bind_param stick to the old array $res -> bind_param ( "ss", $arr, $arr ) Įxample 1 (wont work as expected, creates two empty entries) If you bind array-elements to a prepared statement, the array has to be declared first with the used keys:
$sql = "INSERT INTO `user` SET `name`=?,`email`=?"
"email" => = new mysqli ( "localhost", "root", "", "tests" ) You have to explicitly reassign every single value in an array, for the references to be kept. Re-assigning an array will break any references, no matter if the keys are identical.
There are some things to note when working with mysqli::bind_param() and array-elements.
#PHP INSERT INTO MYSQL PARAMETERIZED ARCHIVE#
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