while-loop

问题 I have the following code: include $_SERVER['DOCUMENT_ROOT'].'/include/conn.php'; $query = "SELECT title FROM news_event"; $result = $mysqli->query($query); $row = $result->fetch_array(MYSQLI_BOTH); $row_cnt = $result->num_rows; $result->free(); $mysqli->close(); This is fine if there is only one result as I can just echo $row['title'] but if there are lots of results, how do I get this to loop through and print every row? I'm sure this is really simple but I'm just not sure what I need to

问题 I have the following code: include $_SERVER['DOCUMENT_ROOT'].'/include/conn.php'; $query = "SELECT title FROM news_event"; $result = $mysqli->query($query); $row = $result->fetch_array(MYSQLI_BOTH); $row_cnt = $result->num_rows; $result->free(); $mysqli->close(); This is fine if there is only one result as I can just echo $row['title'] but if there are lots of results, how do I get this to loop through and print every row? I'm sure this is really simple but I'm just not sure what I need to

问题 I have the following code: include $_SERVER['DOCUMENT_ROOT'].'/include/conn.php'; $query = "SELECT title FROM news_event"; $result = $mysqli->query($query); $row = $result->fetch_array(MYSQLI_BOTH); $row_cnt = $result->num_rows; $result->free(); $mysqli->close(); This is fine if there is only one result as I can just echo $row['title'] but if there are lots of results, how do I get this to loop through and print every row? I'm sure this is really simple but I'm just not sure what I need to

问题 This question is a follow-up from this link Java SE do while loop issues This is an application asking for a room's name then second prompt to ask for its dimensions to perform some calculations. right after everything has been done, the application should be able to return back to the first prompt asking for the name of room etc. class Room { private String name; private double length; private double width; private double height; public Room(String r, double l, double w, double h) { name = r

问题 This question is a follow-up from this link Java SE do while loop issues This is an application asking for a room's name then second prompt to ask for its dimensions to perform some calculations. right after everything has been done, the application should be able to return back to the first prompt asking for the name of room etc. class Room { private String name; private double length; private double width; private double height; public Room(String r, double l, double w, double h) { name = r

问题 I have an HTML form that allows the user to select from a list of employees. The variable is '$empfullname.' However, I also want them to be able to select an 'All' option and if selected it should take the first employee and run the PHP script, then take the next, and so on and so forth. However, the code I have right now if 'All' is selected just displays the first employee in the table and stops. Maybe I need a foreach in their as well? Any help is greatly appreciated. Thanks. if (

问题 I have a php script for check the availability of some data. I call this script from external jquery. the jquery is running fine. here is my php: <?php $avares = checkAva($fi_nm, $tbl_nm, $txtval); echo $avares; function checkAva($field, $table, $curval) { $avres = mysql_query("SELECT " . $field . " FROM " . $table . "") or die("query failed"); while ($a_row = mysql_fetch_array($avres)) { $dbval = $a_row[$field]; if ($curval == $dbval) { return "no"; } else { return "yes"; } } } ?> $curval is

问题 I'm trying to make the variable number increase if user guessed the right number! And continue increase the increased one if it is guessed by another user. But it's seem my syntax is wrong. So i really need your help. Bellow is my code: #!/usr/bin/python # Filename: while.py number = 23 running = True while running: guess = int(raw_input('Enter an integer : ')) if guess == number: print 'Congratulations, you guessed it. The number is now increase' number += 1 # Increase this so the next user

问题 My attempt is below; to first start with a while loop to create the array, then iterate through each with a foreach in attempt to count each item in array. $begin = $_POST['startpoint']; $end = $_POST['endpoint']; $current_start = $begin; $num1 = 3; $num2 = 355; while ($i = $begin; $i <= $end; ++$i) { $array[] = $i; foreach ($array as &$counted) { echo '<span>Star SC ' + $counted + ' mag ' + $num1 + $num2; } } the desired output would be something like this; if user inserted say 10002 and

问题 python version = Python 3.8.0 pip version = 19.3.1 C:\Users\Sami Ullah Ch>pip3 install opencv-python ERROR: Could not find a version that satisfies the requirement opencv-python (from versions: none) 回答1: Install OpenCV Refresh the packages index and install the OpenCV package by typing: sudo apt update sudo apt install python3-opencv The command above will install all packages necessary to run OpenCV. Verify the OpenCV installation To verify the installation we will import the cv2 module and