3
votes
How to link submit button with the <select> list in HTML?
You can achieve that using JavaScript:
<div>
<h1>SELECT A TOPIC</h1>
<select id="select">
<option value="physics">physics</option>
<option value="...
3
votes
phpMyAdmin: "mysql extension missing" error
We all know that phpMyAdmin can be flaky sometimes. Unfortunately, I can't tell you how to fix it -- but I can tell you how to use mysql50 shell from the command line. Try stuff like this:
mysql50 ...
- 3,050
2
votes
pset8 (mashup) - Inserting $places variable into configure function in scripts.js
I figured it out. <%= ... %> is indeed the way you pass in arguments to _.template. When I watched the video in the problem set again the prof mentioned how this code operates similarly to the "%i" ...
- 77
2
votes
Accepted
register php pset7 query to INSERT do not work
Such a subtle thing. Your are inserting 3 columns (username, hash, cash). The computer thinks you are sending 4 values because of the comma in your cash amount. VALUES(?, ?, 10000,00)
- 28k
2
votes
Accepted
When I run my apache50 server at ~/workspace/pset7/public why does login.php files open?
From the pset instructions:
Know that index.php is the
file that’s loaded by default when you visit a URL like https://ide50-username.cs50.io/.
...which calls (redirects to) login.php (via ...
- 28k
2
votes
include 'file.php' does not seem to work
You've probably gotten used to using #include statements in C. The equivalent function in PHP is require(). If you have access to pset7 or pset8, just look at the distribution code provided. You'll ...
- 3,050
2
votes
Accepted
2
votes
cs50::init(_DIR_."/../config.json") pset7
To answer the specific question from your comment "why is :: used?"
From the config section of the spec
(That :: syntax just means that init is "inside of" an "object" called CS50. An object in ...
- 28k
1
vote
Accepted
How can I update the version of php on my cs50 appliance?
You don't need to update it to complete your problem sets. update50 will take care of the necessary updates. If you are done with your problem set. you can download apache, mysql, php7, phpmyadmin to ...
- 176
1
vote
illegal string offset error in portfolio
Each time you do this $positions[] = ["price" =>number_format($positions["price"],2,'.',',')];
there is a row added to the $positions array that does not have "name", "shares" or "symbol". Ditto ...
- 28k
1
vote
Accepted
Pset7 - Portfolio: $positions not filling
Oh. My. Goodness. My 2nd test condition wasn't a valid stock (just some random capital letters that I thought looked like an actual stock symbol) so
if ($stock !== false)
would kill the foreach() ...
1
vote
Accepted
Do calls to render() overwrite each other?
When you call render() in a controller, the function is only executed once and then it exits.
No other code in the PHP Controller will execute after the call to render(), so it is not possible for ...
- 3,050
1
vote
redirect my apache index?
I went with a change in /etc/apache2/sites-available
Works good thanks!
Here is some shortcuts for future reference.
pi@raspberrypi2 /etc/apache2/sites-available $ apache2 default
Usage: apache2 [-...
- 96
1
vote
Accepted
redirect my apache index?
NEW ADVICE:
This tutorial should help you to change the DocumentRoot of your website by using Apache2 Virtual Hosts.
The focus of the tutorial is on how to host more than one domain or subdomain on ...
- 3,050
1
vote
Accepted
1
vote
Accepted
Encrypted passwords in POST method
Q: When should I encrypt passwords?
A: Always, and as soon as possible.
Whenever a user enters sensitive information like a password, you should immediately encrypt it using a one-way hash function ...
- 3,050
1
vote
Accepted
C$50 Finance Pset7 - Buy.php not INSERTing shares correctly
Learn something new every day! From the manual:
With ON DUPLICATE KEY UPDATE, the affected-rows value per row is 1 if the row is inserted as a new row, 2 if an existing row is updated, and 0 if an ...
- 28k
1
vote
Accepted
How difficult are pset7 and pset8?
PHP is much easier than C in many ways. You definitely won't need to worry about pointers and malloc() and free() any more! You will be doing some file I/O, but nothing involving low-level file stream ...
- 3,050
1
vote
pset7 reset password php mail function doesn't send email
OK, I want you to try exactly what I did:
Execute the following to make sure you have git installed, and wait
for the command to finish
sudo apt-get install git
Execute the following to get the ...
- 7,376
1
vote
Accepted
PSET8: fopen() not working for import
You added an extra unwanted ; on this line:
if ($handle == FALSE);
Remove the semicolon and it will work as wanted.
- 7,376
1
vote
Drop-down Menu for Sell_View.PHP gives empty options
How are you passing the php variable from your controller to your viewing page (sell page)? You are storing the array returned by your mysql query in $symbol, but it looks like you are passing $stocks ...
- 1,415
1
vote
Accepted
How to make search.php return results that are more relevant
It's as simple as turning this
and obviously I would prefer "Cincinnati, OH" to be the first result.
into computer code :) Kinda moves into the realm of computer learning/intelligence.
First ...
- 28k
1
vote
How should I connect to the multiple databases?
Admittedly I don't fully grasp what you mean "merge several psets". However,in the narrow and specific context of CS50 pset7 & pset8, you do not need two databases. Consider adding the places ...
- 28k
1
vote
Accepted
week7 lecture2 source code speller.php not found
From your first link choose Index in the Source Code pane (far right). Choose misspellings/. Click on download to the right of speller. It will open with a text editor (like notepad++). It's also in ...
- 28k
1
vote
Accepted
pset6: PHP Templating and Indexes
about your /test problem, you forgot to check if the path already has a '/' at the end, and add it if it's not the case.
- 36
1
vote
Accepted
Debugging in Problem Set 7: CS50 Finance
I forgot to answer my own question. Using dump() is better than using print statements
- 121
1
vote
Accepted
Looking at the course, could I use PDO instead of mysql?
as you reach pset7, the first pset that you are going to interact with a database in it, you won't have to write your own code to connect with your database. instead, there is a query function ...
- 17.7k
1
vote
Accepted
PSET8 import undefined offsets and fatal error
The problem is your input data. Your query is expecting 12 values on every line. The first line in your example has 9. You "lost" the blank columns from the text file, presumably when you converted ...
- 28k
1
vote
Accepted
PSET8 import fatal error
The problem is your insert query. You are inserting 12 columns, you have 12 ? placeholders, but you are sending 13 arguments.
Also, beware: implode returns a string. So you $str_values[0] et. al. ...
- 28k
1
vote
Printing from SQL in PHP
recall that, assuming the query is syntactically correct, query returns an array of the resulting rows (if any) or an empty array otherwise. try print_r'ing $comment to learn about the structure of ...
- 17.7k
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