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php Programming Glossary: everyHow can an SQL query return data from multiple tables http://stackoverflow.com/questions/12475850/how-can-an-sql-query-return-data-from-multiple-tables to tie up all these other tables the table that ties everything together. The ID field is actually the unique lot number.. lay it out intuitively use nice indenting so that everything is as clear as it can be. If you go on to teach others.. specify how to join the tables the database has matched every row from the first table with every row from the second table...
What's the best method for sanitizing user input with PHP? http://stackoverflow.com/questions/129677/whats-the-best-method-for-sanitizing-user-input-with-php you must escape it with htmlspecialchars . This means that every single echo or print statement should use htmlspecialchars ...
Are PDO prepared statements sufficient to prevent SQL injection? http://stackoverflow.com/questions/134099/are-pdo-prepared-statements-sufficient-to-prevent-sql-injection of your program it becomes easy to enforce or audit that every query correctly uses parameterization. In this case sql injection..
Reference - frequently asked questions about PDO [closed] http://stackoverflow.com/questions/15990857/reference-frequently-asked-questions-about-pdo Also due to many bad examples telling you to wrap every PDO statement into try..catch block I have to make a distinct..
http://stackoverflow.com/questions/16959576/reference-what-is-variable-scope-which-variables-are-accessible-from-where-and in your application doesn't mean you can refer to foo from everywhere else inside the application. The variable foo has a certain.. scope is essential to writing complex applications If every variable you declare would be available from everywhere else.. If every variable you declare would be available from everywhere else inside your application you'd be stepping all over..
http://stackoverflow.com/questions/279170/utf-8-all-the-way-through has the same effect. Input Unfortunately you should verify every received string as being valid UTF 8 before you try to store.. only a recommendation hence the need for being explicit on every single form tag. Other Code Considerations Obviously enough.. be encoded in valid UTF 8. You need to make sure that every time you process a UTF 8 string you do so safely. This is unfortunately..
Reference - What does this symbol mean in PHP? http://stackoverflow.com/questions/3737139/reference-what-does-this-symbol-mean-in-php is this This is a collection of questions that come up every now and then about syntax in PHP. This is also a Community Wiki.. then about syntax in PHP. This is also a Community Wiki so everyone is invited to participate in maintaining this list. Why is..
Secure hash and salt for PHP passwords http://stackoverflow.com/questions/401656/secure-hash-and-salt-for-php-passwords cannot use either bcrypt or scrypt with SHA2 hashes. Reset everyone's passwords when the database is compromised. Implement a.. enough time to at least lock the system down if not change every password in the database. Jeremiah Grossman CTO of Whitehat.. supports PHP 3.0.18 through 5.3 so it is usable on almost every installation imaginable ”and should be used if you don't know..
Who needs singletons? [closed] http://stackoverflow.com/questions/4595964/who-needs-singletons you only have to mock out the getInstance method not every single method in a static class which in some languages can..
http://stackoverflow.com/questions/5166087/php-global-in-functions of view doesn't matter. Since the Global topic comes up every now and then we could use a good canonical answer to link against... are evil This is true for the global keyword as well as everything else that reaches from a local scope to the global scope..
How do I expire a PHP session after 30 minutes? http://stackoverflow.com/questions/520237/how-do-i-expire-a-php-session-after-30-minutes collector is started it will check the validity for every registered session. And that is cost intensive. Furthermore.. time of the last activity i.e. request and update it with every request if isset _SESSION 'LAST_ACTIVITY' time _SESSION 'LAST_ACTIVITY'.. last activity time stamp Updating the session data with every request does also change the session file ™s modification date..
Achieve hierarchy, Parent/Child Relationship in an effective and easy way http://stackoverflow.com/questions/11064913/achieve-hierarchy-parent-child-relationship-in-an-effective-and-easy-way in Adjacency List but they also store a root_id column. Every member of a given tree has the same value for root_id which..
http://stackoverflow.com/questions/12445972/stop-using-global-in-php clear to implement and do not require a single global . Every function and class gets all its necessary data passed in the..
Can I rely on PHP php.ini precision workaround for floating point issue http://stackoverflow.com/questions/14587290/can-i-rely-on-php-php-ini-precision-workaround-for-floating-point-issue so there is some rounding going on. A good start is What Every Computer Scientist Should Know About Floating Point Arithmetic..
http://stackoverflow.com/questions/16959576/reference-what-is-variable-scope-which-variables-are-accessible-from-where-and What about functions inside functions and classes Every new function declaration introduces a new scope it's that simple...
A more pretty/informative Var_dump alternative in PHP? http://stackoverflow.com/questions/2141585/a-more-pretty-informative-var-dump-alternative-in-php more pretty informative Var_dump alternative in PHP Every decent programmer has a print_r or var_dump wrapper they use..
PHP change the maximum upload file size http://stackoverflow.com/questions/2184513/php-change-the-maximum-upload-file-size files up to 30mb big. My server side script is done in PHP Every time I try and upload a file I receive a error claiming the..
What are the best PHP input sanitizing functions? http://stackoverflow.com/questions/3126072/what-are-the-best-php-input-sanitizing-functions data into the database that's when you need to sanitize. Every single database API does it differently. You've already discovered..
http://stackoverflow.com/questions/3726721/php-math-precision surprises like this. Here's another interesting read What Every Computer Scientist Should Know About Floating Point Arithmetic..
Why would one omit the close tag? http://stackoverflow.com/questions/4410704/why-would-one-omit-the-close-tag returned code is not sent to the browser immediately. Every good practice book and wiki starts with this 'rule' but nobody..
How do you use bcrypt for hashing passwords in PHP? http://stackoverflow.com/questions/4795385/how-do-you-use-bcrypt-for-hashing-passwords-in-php do you use bcrypt for hashing passwords in PHP Every now and then I hear the advice Use bcrypt for storing passwords..
What's better at freeing memory with PHP: unset() or $var = null http://stackoverflow.com/questions/584960/whats-better-at-freeing-memory-with-php-unset-or-var-null expression will be null. Because what else should PHP do Every expression needs to result in some value. A variable with null..
http://stackoverflow.com/questions/5922762/eval-base64-decode-php-virus community website was recently infected with a virus. Every index.php file was changed so that the opening php tag of these..
Reference: What is a perfect code sample using the MySQL extension? [closed] http://stackoverflow.com/questions/6198104/reference-what-is-a-perfect-code-sample-using-the-mysql-extension provide a good readable reference especially for newbies. Every day there is a huge influx of questions with really bad code..
int((0.1+0.7)*10) = 7 in several languages. How to prevent this? http://stackoverflow.com/questions/6439140/int0-10-710-7-in-several-languages-how-to-prevent-this representation share improve this question What Every Computer Scientist Should Know About Floating Point Arithmetic..
Reference: Comparing PHP's print and echo http://stackoverflow.com/questions/7094118/reference-comparing-phps-print-and-echo print foo work then For the same reason why 5 4 works. Every operator can be applied to a sub expression in parentheses...
How to implement event listening in PHP http://stackoverflow.com/questions/7469396/how-to-implement-event-listening-in-php publishing received message msg n pub send msg stream.php Every user connecting to the site gets his own stream.php. This script..
“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed] http://stackoverflow.com/questions/7745578/notice-child-pid-xxxx-exit-signal-segmentation-fault-11-in-apache-error-lo using Apache PHP MySQL stack. Using as framework CakePHP. Every now and then I get a blank white page. I can't debug it through..
“Cannot send session cache limiter - headers already sent” [duplicate] http://stackoverflow.com/questions/8812754/cannot-send-session-cache-limiter-headers-already-sent a problem with sessions which is becoming very annoying. Every time I try to start a session on a particular page I get the..
http://stackoverflow.com/questions/960841/how-to-use-dom-php-parser id on two different divs there are classes for that point. Every element should have an unique id. Code to get the contents of..
How to renew/extend facebook access tokens with PHP? http://stackoverflow.com/questions/10021892/how-to-renew-extend-facebook-access-tokens-with-php become invalid. What you can do to extend the token is EVERY TIME user comes to your page s you can check if they are logged..
Optimizing WebSQL Local Database Population http://stackoverflow.com/questions/10031605/optimizing-websql-local-database-population sure it's because it executes an individual SQL query for EVERY row. I've been reading up on transactions Commits and Rollbacks..
Dynamically generate classes at runtime in php? http://stackoverflow.com/questions/1203625/dynamically-generate-classes-at-runtime-in-php my database. I don't want to create a separate class for EVERY table 203 . So my plan was to do something like function DoSomething_Validate..
How do I throttle my site's API users? http://stackoverflow.com/questions/1375501/how-do-i-throttle-my-sites-api-users if they're over the limit but all this extra overhead on EVERY request would be defeating the purpose. What are other less..
http://stackoverflow.com/questions/17109818/install-php-mcrypt-on-centos6 the epel repo. At this point im just stumped. Ive followed EVERY tutorial ive found online and get the same error. Notes Godaddy..
http://stackoverflow.com/questions/3208743/php-fuzzy-search-matching Now create a matrix and compare each headline against EVERY other headline for similarity. In other words for 5 headlines..
PHP include file strategy needed http://stackoverflow.com/questions/339202/php-include-file-strategy-needed well as an include of any files that will be required by EVERY page. And finally the last standard convention you may not use..
How To Remove All DtDdWrappers and Labels on Zend Form Elements http://stackoverflow.com/questions/4191216/how-to-remove-all-dtddwrappers-and-labels-on-zend-form-elements The problem is you have to apply this set of decorators to EVERY element that you don't want to be wrapped in the dd dt tags..
Is it okay to have a very long .htaccess file? http://stackoverflow.com/questions/4435482/is-it-okay-to-have-a-very-long-htaccess-file your page load speed. .htaccess files are evaluated on EVERY server request. Even for static images CSS and JS files. So..
How do I make Firefox reload page when back button is pressed? http://stackoverflow.com/questions/4630484/how-do-i-make-firefox-reload-page-when-back-button-is-pressed page functionality. I know I have seen pages that reload EVERY TIME the back button is used HOW ARE THEY DOING IT SOLVED Turns..
http://stackoverflow.com/questions/5255343/preventing-xss-with-php XSS really mean I have to run a htmlspecialchars EVERY time I output some user input For example every time I display..
Are mysql_real_escape_string() and mysql_escape_string() sufficient for app security? http://stackoverflow.com/questions/5414731/are-mysql-real-escape-string-and-mysql-escape-string-sufficient-for-app-secu Therefore you're ALWAYS guaranteed to be protected against EVERY KNOWN HACK at the bare minimum. And it's less code pdo new PDO..
Force Logout users if users are inactive for a certain period of time http://stackoverflow.com/questions/572938/force-logout-users-if-users-are-inactive-for-a-certain-period-of-time movement or keyboard movement when users are doing on EVERY page of my application. But the code would be very ugly and..
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