(PHP 5, PHP 7)
mysqli_stmt::$param_count -- mysqli_stmt_param_count — Returns the number of parameters for the given statement
Object oriented style
Procedural style
mysqli_stmt_param_count ( mysqli_stmt $stmt ) : int
Returns the number of parameter markers present in the prepared statement.
stmt
Procedural style only: A statement identifier returned by mysqli_stmt_init().
Returns an integer representing the number of parameters.
Example #1 Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}
if ($stmt = $mysqli->prepare("SELECT Name FROM Country WHERE Name=? OR Code=?")) {
    $marker = $stmt->param_count;
    printf("Statement has %d markers.\n", $marker);
    /* close statement */
    $stmt->close();
}
/* close connection */
$mysqli->close();
?> Example #2 Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}
if ($stmt = mysqli_prepare($link, "SELECT Name FROM Country WHERE Name=? OR Code=?")) {
    $marker = mysqli_stmt_param_count($stmt);
    printf("Statement has %d markers.\n", $marker);
    /* close statement */
    mysqli_stmt_close($stmt);
}
/* close connection */
mysqli_close($link);
?> The above examples will output:
Statement has 2 markers.
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    https://www.php.net/manual/en/mysqli-stmt.param-count.php