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php Programming Glossary: mathematical

Regular expression preg_quote symbols are not detected

http://stackoverflow.com/questions/6096634/regular-expression-preg-quote-symbols-are-not-detected

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LSA - Latent Semantic Analysis - How to code it in PHP?

http://stackoverflow.com/questions/1014927/lsa-latent-semantic-analysis-how-to-code-it-in-php

of polysemy and data sets with too many topics. It's mathematical probabilistic basis is unsound it assumes normal ish Gaussian..

How to evaluate formula passed as string in PHP?

http://stackoverflow.com/questions/1015242/how-to-evaluate-formula-passed-as-string-in-php

it here for you. This class can be used to safely evaluate mathematical expressions. The class can take an expression in a text string.. values of variables and calculating the results of mathematical functions and operations. It supports implicit multiplication.. Use the EvalMath class when you want to evaluate mathematical expressions from untrusted sources. You can define your own..

PHP: Best random numbers

http://stackoverflow.com/questions/1041509/php-best-random-numbers

number generators in fact the best that can be done from mathematical functions are pseudorandom they seem random enough for most..

Php, date manipulation?

http://stackoverflow.com/questions/1047375/php-date-manipulation

. date is used for display purposes only. Never use it for mathematical manipulations. time returns the current timestamp an int representing..

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

sill remains Floating Point have Accuracy Problems but for mathematical solutions you can look at Machine precision and backward error..

Which PHP mcrypt cipher is safest?

http://stackoverflow.com/questions/2809855/which-php-mcrypt-cipher-is-safest

in 2001 and it shows no sign of weakness nowadays. Some mathematical properties were found later on but they do not impact actual..

How to catch a division by zero?

http://stackoverflow.com/questions/3071067/how-to-catch-a-division-by-zero

to catch a division by zero I have a large mathematical expression that has to be created dinamically. So for example..

Which ORM for codeigniter? [closed]

http://stackoverflow.com/questions/3438198/which-orm-for-codeigniter

Object Relational Impedance Mismatch. Basically the formal mathematical model for databases used to ensure that they stay intact follows..

When (if ever) is eval NOT evil?

http://stackoverflow.com/questions/3499672/when-if-ever-is-eval-not-evil

eval is used. For example when you are building up complex mathematical expressions based on user input or when you are serializing..

Best practice for working with currency values in PHP?

http://stackoverflow.com/questions/3819508/best-practice-for-working-with-currency-values-in-php

store all values in strings 34.12 and create my own mathematical replacement functions. These function would convert the value..

Querying an audio/video file for information

http://stackoverflow.com/questions/3936816/querying-an-audio-video-file-for-information

hour 60 minute second` The expr command says to perform a mathematical expression. Unfortunately it's rather stupid. First special..

Process mathematical equations in php

http://stackoverflow.com/questions/4019418/process-mathematical-equations-in-php

mathematical equations in php A user is allowed to enter any mathematical.. equations in php A user is allowed to enter any mathematical equation they like with one variable x 5 1 x 2 x 3 56 13 These..

Generate Random Weighted value

http://stackoverflow.com/questions/4030427/generate-random-weighted-value

in your first picture what you're showing is somewhat of a mathematical impossibility. Test 1 Test 2 You'll notice that the percentages..

DomDocument and html entities

http://stackoverflow.com/questions/7220737/domdocument-and-html-entities

needs a little hack . Also if you are trying to display mathematical formulas as A B suggests have a look at MathML . share improve..

Calculate elapsed time in php

http://stackoverflow.com/questions/7850259/calculate-elapsed-time-in-php

time in php. The problem is not in php it's with my mathematical skills. For instance Time In 11 35 20 hh mm ss now say the current..

is_null($x) vs $x === null in PHP [duplicate]

http://stackoverflow.com/questions/8228837/is-nullx-vs-x-null-in-php

variable is initialized at the time Finally is there any mathematical reason to prefer is_null over null Something about null not..

Can PHP and C++ pass data between each other?

http://stackoverflow.com/questions/9936280/can-php-and-c-pass-data-between-each-other

PHP and C pass data between each other I have a lot of mathematical calculations in my PHP script which can be quite slow at times...