Weird PHP error: ‘Can’t use function return value in write context’
You mean though incidentally you really mean
php
Call to undefined function curl_init().?
If you’re on Windows: Go to your php.ini file and remove the ; mark from the beginning of the following line: After you have saved the file you must restart your HTTP server software (e.g. Apache) before this can take effect. For Ubuntu 13.0 and above, simply use the debundled package. In a terminal type the following to install … Read more
How to solve PHP error ‘Notice: Array to string conversion in…’
When you have many HTML inputs named C[] what you get in the POST array on the other end is an array of these values in $_POST[‘C’]. So when you echo that, you are trying to print an array, so all it does is print Array and a notice. To print properly an array, you either loop through it and echo each element, or … Read more
How do I make a simple crawler in PHP?
Meh. Don’t parse HTML with regexes. Here’s a DOM version inspired by Tatu’s: Edit: I fixed some bugs from Tatu’s version (works with relative URLs now). Edit: I added a new bit of functionality that prevents it from following the same URL twice. Edit: echoing output to STDOUT now so you can redirect it to whatever file you want … Read more
Print array to a file
Either var_export or set print_r to return the output instead of printing it. Example from PHP manual You can then save $results with file_put_contents. Or return it directly when writing to file:
Fatal error: Call to a member function bind_param() on boolean [duplicate]
The problem lies in: The prepare() method can return false and you should check for that. As for why it returns false, perhaps the table name or column names (in SELECT or WHERE clause) are not correct? Also, consider use of something like $this->db->conn->error_list to examine errors that occurred parsing the SQL. (I’ll occasionally echo the actual SQL statement strings and paste into phpMyAdmin to test, … Read more
How can I do ‘insert if not exists’ in MySQL?
Use INSERT IGNORE INTO table. There’s also INSERT … ON DUPLICATE KEY UPDATE syntax, and you can find explanations in 13.2.6.2 INSERT … ON DUPLICATE KEY UPDATE Statement. Post from bogdan.org.ua according to Google’s webcache: 18th October 2007 To start: as of the latest MySQL, syntax presented in the title is not possible. But there are several very easy ways to accomplish … Read more
Creating a search form in PHP to search a database?
try this out let me know what happens. Form: Form.php: Edit: Cleaned it up a little more. Final Cut (my test file):
How do I pass JavaScript variables to PHP?
You cannot pass variable values from the current page JavaScript code to the current page PHP code… PHP code runs at the server side, and it doesn’t know anything about what is going on on the client side. You need to pass variables to PHP code from the HTML form using another mechanism, such as … Read more
What does __FILE__ mean?
The realpath() function gives you the file-system path, with any symbolic links and directory traversing (e.g. ../../) resolved. The dirname() function gives you just the directory, not the file within it. __FILE__ is a magic constant that gives you the filesystem path to the current .php file (the one that __FILE__ is in, not the one it’s included by if it’s an … Read more