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php Programming Glossary: noReference - What does this error mean in PHP? http://stackoverflow.com/questions/12769982/reference-what-does-this-error-mean-in-php this This is a number of answers about warnings errors and notices you might encounter while programming PHP and have no clue.. notices you might encounter while programming PHP and have no clue how to fix. This is also a Community Wiki so everyone is.. like Headers already sent or Calling a member of a non object pop up frequently on StackOverflow. The root cause of..
Why shouldn't I use mysql_* functions in PHP? http://stackoverflow.com/questions/12859942/why-shouldnt-i-use-mysql-functions-in-php as long as it works on my site This question serves as a canonical information source regarding the discouraged use of ext.. answers detailing why the use of mysql_ functions is no longer recommended. php mysql database pdo share improve.. may have to keep the rest of your sanitize function for now if your database and application flow expect HTML context safe..
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 that user input can be filtered. PHP even has a now deprecated feature called magic quotes that builds on this.. feature called magic quotes that builds on this idea. It's nonsense. Forget about filtering Or cleaning or whatever people.. function for this purpose mysqli_real_escape_string . Another example is HTML If you embed strings within HTML markup..
Reference: Why does the PHP (or other server side) code in my Javascript not work? http://stackoverflow.com/questions/13840429/reference-why-does-the-php-or-other-server-side-code-in-my-javascript-not-wor does the PHP or other server side code in my Javascript not work Note This is a reference question. If you see one of.. ' foo ' var baz php echo 42 alert baz script Why does this not write bar into my text file but alerts 42 php javascript .. has finished outputting the response the script ends and nothing will happen on the server until a new HTTP request comes..
Using a regular expression to validate an email address http://stackoverflow.com/questions/201323/using-a-regular-expression-to-validate-an-email-address email validation share improve this question There is no simple regular expression for this problem see this fully RFC.. that validating it per the RFC tells you absolutely nothing about whether the person entering the address is its true.. same web page as was the address. That's the only way to know you got the address of the person entering it which is why..
http://stackoverflow.com/questions/279170/utf-8-all-the-way-through set the connection charset to utf8 . This way MySQL does no conversion from its native UTF 8 when it hands data off to your.. link 'utf8' procedural style If the driver does not provide its own mechanism for setting the connection character.. trick but you have to use it religiously. There's really no way around this as malicious clients can submit data in whatever..
Simple “Long Polling” example code? http://stackoverflow.com/questions/333664/simple-long-polling-example-code on how Long Polling works For example this and this but no simple examples of how to implement this in code. All I can.. I initially thought.. Basically you have a page that does nothing until the data you want to send is available say a new.. poll server in something like Python's twisted which does not rely on one thread per request. cometD is an popular one which..
Convert HTML + CSS to PDF with PHP? http://stackoverflow.com/questions/391005/convert-html-css-to-pdf-with-php HTML CSS to PDF with PHP Ok I'm now banging my head against a brick wall with this one. I have.. my head against a brick wall with this one. I have an HTML not XHTML document that renders fine in Firefox 3 and IE 7. It.. fairly basic CSS to style it and renders fine in HTML. I'm now after a way of converting it to PDF. I have tried DOMPDF it..
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.. state depends on both salt and key user password and no state can be precomputed without the knowledge of both. Because.. user password and no state can be precomputed without the knowledge of both. Because of this key difference bcrypt is a one..
How should a model be structured in MVC? http://stackoverflow.com/questions/5863870/how-should-a-model-be-structured-in-mvc in the content are there to explain terms and concepts and not to imply my own credibility on subject. Updated version The.. how they are different. What is NOT a model The model is not a class or any single object. It is a very common mistake to.. perpetuate this misconception. Neither is it an ORM nor an abstraction of database tables. Anyone who tells you otherwise..
http://stackoverflow.com/questions/8028957/headers-already-sent-by-php I am getting several errors looking like this Warning Cannot modify header information headers already sent by output started.. any output is made . Otherwise the call fails Warning Cannot modify header information headers already sent output started.. or after UTF 8 Byte Order Mark Previous error messages or notices Intentional print echo and other functions producing output..
Highlight row when the checkbox is true http://stackoverflow.com/questions/10529955/highlight-row-when-the-checkbox-is-true edittype textarea editoptions size 30 maxlength 30 name 'Notes' index 'Notes' width 120 align 'center' sortable false editable.. editoptions size 30 maxlength 30 name 'Notes' index 'Notes' width 120 align 'center' sortable false editable true edittype.. pager '#gridpager' recordtext View 0 1 of 2 emptyrecords No records to view loadtext Loading... pgtext Page 0 of 1 height..
http://stackoverflow.com/questions/11061355/security-threats-with-uploads images to my server either from their system or from net.Now to check even the size of these images I have to store them.. I have to store them in my tmp folder. Isn't it risky No. Just storing data in a file in a temp folder is not risky if..
How to validate an email address in PHP [duplicate] http://stackoverflow.com/questions/12026842/how-to-validate-an-email-address-in-php way to find that out is by sending a confirmation mail. Now that you have your easy answer feel free to read on about email.. learn or otherwise just use the fast answer and move on. No hard feelings. Trying to validate an email address using a regex.. characters although many clients servers don't accept it Note that filter_var is as already stated only available as of..
How to Use AJAX in a WordPress Shortcode? http://stackoverflow.com/questions/13498959/how-to-use-ajax-in-a-wordpress-shortcode function response ERROR HANDLING if response.success No data came back maybe a security error if response.data '#randomposts'..
“Warning: Cannot modify header information - headers already sent by” error [duplicate] http://stackoverflow.com/questions/1912029/warning-cannot-modify-header-information-headers-already-sent-by-error GetSQLValueString theValue theType theDefinedValue theNotDefinedValue if PHP_VERSION 6 theValue get_magic_quotes_gpc.. break case defined theValue theValue theDefinedValue theNotDefinedValue break return theValue if isset _GET 'id' _GET 'id'.. submit value Yes input name no type button id no value No p input type hidden name deleteForm value form form thanking..
What's wrong with using $_REQUEST[]? http://stackoverflow.com/questions/2142497/whats-wrong-with-using-request might want to take some query parameters out of the URL. No the problem with _REQUEST is nothing to do with conflating GET..
How to remove duplicate values from a multi-dimensional array in PHP http://stackoverflow.com/questions/307674/how-to-remove-duplicate-values-from-a-multi-dimensional-array-in-php share improve this question Here is another another way. No intermediate variables are saved. We used this to de duplicate..
What is the difference between single-quoted and double-quoted strings in PHP? http://stackoverflow.com/questions/3446216/what-is-the-difference-between-single-quoted-and-double-quoted-strings-in-php quotation. You don't need to escape quotes in this syntax. Nowdoc since PHP 5.3.0 string syntax works essentially like single.. which follows is enclosed in single quotes e.g. 'EOT'. No parsing is done in nowdoc. Speed I would not put too much weight..
How should I choose an authentication library for CodeIgniter? http://stackoverflow.com/questions/346980/how-should-i-choose-an-authentication-library-for-codeigniter SimpleLoginSecure pc_user Fresh Powered and a few more. None of them were up to par IMO either they were lacking basic.. can be switched but shouldn't be there in the first place No max limit on login attempts VERY unsafe Dealbreaker Hijacks.. with optional test implementation Full documentation No autoloading required. Just in time loading of libraries for..
Secure hash and salt for PHP passwords http://stackoverflow.com/questions/401656/secure-hash-and-salt-for-php-passwords Emphasis mine. What makes a good password anyway Entropy . Not that I fully subscribe to Randall's viewpoint. In short entropy.. hard to type on a Windows Mobile device too long etc. No password is truly good enough for our purposes so we must protect.. Ruby there is an scrypt gem that will help you out and Node.js now has its own scrypt package. I highly suggest reading..
HTTP authentication logout via PHP http://stackoverflow.com/questions/449788/http-authentication-logout-via-php password protection share improve this question Mu. No correct way exists not even one that's consistent across browsers...
Resize iframe height according to content height in it http://stackoverflow.com/questions/525992/resize-iframe-height-according-to-content-height-in-it this question To directly answer your two subquestions No you cannot do this with Ajax nor can you calculate it with PHP...
How to create a simple 'Hello World' module in Magento? http://stackoverflow.com/questions/576908/how-to-create-a-simple-hello-world-module-in-magento or something similar would display the row within a view. No need to be fancy just a echo row id or something similar would.. is the name of your module. Clear the application cache Now that the module file is in place we'll need to let Magento.. Refresh from the All Cache menu Click Save Cache settings Now we make sure that Magento knows about the module Go to System..
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 SQL injection in LIMIT clauses and dynamic table names No error reporting Why does this query not work Broken error reporting..
How to calculate the difference between two dates using PHP? http://stackoverflow.com/questions/676824/how-to-calculate-the-difference-between-two-dates-using-php of the form Start Date 2007 03 24 End Date 2009 06 26 Now I need to find the difference between these two in the following.. by Derick Rethans. Ported to PHP by Emil H 2011 05 02. No rights reserved. See here for original code http svn.php.net..
Reference: Comparing PHP's print and echo http://stackoverflow.com/questions/7094118/reference-comparing-phps-print-and-echo You can use print wherever a prefix operator can be used. Note this can get weird print print print print 7 is a valid expression.. and hence don't return anything. Is print a function No. While all function calls are expressions and print e is an.. can be applied to a sub expression in parentheses. Note that these parentheses are quite different from function call..
http://stackoverflow.com/questions/8028957/headers-already-sent-by-php how to fix it php header share improve this question No output before sending headers Functions that send modify HTTP.. the problem early on. Without such an editor available or Notepad on Windows which can remedy the problem per menu command.. isset or @ when this doesn't obstruct debugging later on. No error message If you have error_reporting or display_errors..
How to get useful error messages in PHP? http://stackoverflow.com/questions/845021/how-to-get-useful-error-messages-in-php try and run the script and just get a blank screen back. No error message just empty screen. The cause might have been a..
How to evaluate formula passed as string in PHP? http://stackoverflow.com/questions/1015242/how-to-evaluate-formula-passed-as-string-in-php NAME EvalMath safely evaluate math expressions SYNOPSIS include 'evalmath.class.php' m new EvalMath basic evaluation.. IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.. AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL..
Best way to handle dirty state in an ORM model http://stackoverflow.com/questions/10940265/best-way-to-handle-dirty-state-in-an-orm-model pull Parametrized object if object isDirty there were NO conditions set on clean object or the values have not changed..
How can an SQL query return data from multiple tables http://stackoverflow.com/questions/12475850/how-can-an-sql-query-return-data-from-multiple-tables colors Field Type Null Key Default Extra id int 3 NO PRI NULL auto_increment color varchar 15 YES NULL paint varchar.. brands Field Type Null Key Default Extra id int 3 NO PRI NULL auto_increment brand varchar 15 YES NULL 2 rows.. models Field Type Null Key Default Extra id int 3 NO PRI NULL auto_increment model varchar 15 YES NULL 2 rows..
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 1 If you need need precise 2 digits then the answer is NO you can not use the php precision settings to ascertain a 2..
MySQL server has gone away - in exactly 60 seconds http://stackoverflow.com/questions/1644432/mysql-server-has-gone-away-in-exactly-60-seconds have_community_features YES have_compress YES have_crypt NO have_csv YES have_dynamic_loading YES have_geometry YES have_innodb.. YES have_geometry YES have_innodb YES have_ndbcluster NO have_openssl DISABLED have_partitioning YES have_query_cache..
In PHP with PDO, how to check the final SQL parametrized query? http://stackoverflow.com/questions/1786322/in-php-with-pdo-how-to-check-the-final-sql-parametrized-query the clues for this. Short Answer As mentioned by Ben James NO . The full SQL query does not exist on the PHP side because..
Mysql password hashing method old vs new http://stackoverflow.com/questions/1892607/mysql-password-hashing-method-old-vs-new Access denied for user 'nodari'@'localhost' using password NO facts I need to continue using the new method at slicehost and..
Detecting a url using preg_match? without http:// in the string http://stackoverflow.com/questions/2762260/detecting-a-url-using-preg-match-without-http-in-the-string val urlvalid isValidURL val if urlvalid _SESSION messages NO URLS ALLOWED header Location http www.domain.com post id . _POST..
How to compress/decompress a long query string in PHP? http://stackoverflow.com/questions/2996049/how-to-compress-decompress-a-long-query-string-in-php The query string contains NO sensitive information so I'm not really concerned about security..
How should I choose an authentication library for CodeIgniter? http://stackoverflow.com/questions/346980/how-should-i-choose-an-authentication-library-for-codeigniter of lost password codes Hooks into CI's validation system NO security questions Enforced strong password policy server side.. library doesn't meet these security standards 100 DO NOT USE IT Recent high profile examples of irresponsible coders..
error while using mysql_real_escape_string() http://stackoverflow.com/questions/3520079/error-while-using-mysql-real-escape-string Access denied for user 'ODBC'@'localhost' using password NO in C xampp htdocs shizin admin newArticle.php on line 48 Warning.. Access denied for user 'ODBC'@'localhost' using password NO in C xampp htdocs shizin admin newArticle.php on line 50 Warning..
Publishing To User's Wall Without Being Online/Logged-in - Facebook Sharing Using Graph API http://stackoverflow.com/questions/4814432/publishing-to-users-wall-without-being-online-logged-in-facebook-sharing-usin the following app access_token publish_stream permission NO NEED for the long lived access token Enables your app to post..
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 value Can that be securely and accurately escaped that way NO Why because a hacker could very well still do this Repeat after.. is only meant to escape variable data NOT table names column names and especially not LIMIT fields. LIKE.. REACTIVE defense mechism. It only fixes very limited and KNOWN exploits in the Database. All escaping will NEVER be sufficient..
Insert Blobs in MySql databases with php http://stackoverflow.com/questions/7052655/insert-blobs-in-mysql-databases-with-php Field Type Null Key Default Extra ImageId int 11 NO PRI NULL Image longblob NO NULL 2 rows in set 0.01 sec.. Extra ImageId int 11 NO PRI NULL Image longblob NO NULL 2 rows in set 0.01 sec And here is my query which inserts..
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