php - Fatal error: Call to a member function bind_param() error -

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i trying insert data table getting frustrating error couldn't figure wrong. error below:

fatal error: call member function bind_param() on non-object

i have read means prepare returning false.. here code error occuring

$insert = $mysqli->prepare("insert `hm_desktop`(`username`, `title`, `condition`, `description`, `price`, `brand`, `color`, `hard_drive_capacity`, `others`, `graphics_card`, `ram_capacity`, `operating_system`, `os_edition,` `processor_type`, `processor_speed`, `model`, `product_series`, `included_items`,  `country`, image_one, image_two, image_three, image_four, image_five, `date`) values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)"); $insert->bind_param('sssssssssssssssssssss', $username, $title, $cond, $desc, $price, $brand, $color, $hard_drive_type, $others, $garphics_card, $ram_capacity, $operating_system, $os_edition, $processor_type, $processor_speed,$model, $product_series, $included_items,  $country, $random_name_generated, $i2, $i3, $i4, $i5, $date); $insert->execute();

i have tried hours nothing seems working.. missing here? please help

you have mistake in sql.

the comma after os_edition inside backticks, should outside:

....ating_system`, `os_edition,` `processor...  ....ating_system`, `os_edition`, `processor...

that, , @aynber said s's, variables , graphics_card.


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