php Programming Glossary: operation

How to evaluate formula passed as string in PHP?

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

figure out the proper and safer way to execute mathematic operation passed as string. In my scenario it is values fetched from image.. and calculating the results of mathematical functions and operations. It supports implicit multiplication multivariable functions.. basic evaluation result m evaluate '2 2' supports order of operation parentheses negation built in functions result m evaluate '..

How to encrypt/decrypt data in php?

http://stackoverflow.com/questions/10916284/how-to-encrypt-decrypt-data-in-php

for a limited time . Applying a hash function is a one way operation afterwards it can be safely used for verification without revealing..

PHP file cannot enter some part of code

http://stackoverflow.com/questions/11575531/php-file-cannot-enter-some-part-of-code

can also do this with more complex stuff like the database operation. You probably want to move the error handling out of your sight..

Efficient JPEG Image Resizing in PHP

http://stackoverflow.com/questions/12661/efficient-jpeg-image-resizing-in-php

great on small under 2 MB photos and the entire resize operation takes less than a second on the server. However the site will.. up to 5000x4000 pixels in size . Doing this kind of resize operation with large images tends to increase the memory usage by a very.. script past 80 MB . Is there any way to make this resize operation more efficient Should I be using an alternate image library..

How to [recursively] Zip a directory in PHP?

http://stackoverflow.com/questions/1334613/how-to-recursively-zip-a-directory-in-php

I try to unzip the corresponding downloaded zip file I get operation not permitted This error only happens when I try to unzip on..

How to 'insert if not exists' in MySQL?

http://stackoverflow.com/questions/1361340/how-to-insert-if-not-exists-in-mysql

the UPDATE part just do nothing do some meaningless empty operation like calculating 0 0 Geoffray suggests doing the id id assignment.. for the MySQL optimization engine to ignore this operation . Advantage of this method is that it only ignores duplicate..

How should I ethically approach user password storage for later plaintext retrieval?

http://stackoverflow.com/questions/2283937/how-should-i-ethically-approach-user-password-storage-for-later-plaintext-retrie

today is that the generated passwords produced in a reset operation are generally a bunch of random characters so they're difficult..

Reference - What does this symbol mean in PHP?

http://stackoverflow.com/questions/3737139/reference-what-does-this-symbol-mean-in-php

. If put before the variable the increment decrement operation is done to the variable first then the result is returned. If.. variable is first returned then the increment decrement operation is done. For example apples 10 for i 0 i 10 i echo 'I have '..

Secure hash and salt for PHP passwords

http://stackoverflow.com/questions/401656/secure-hash-and-salt-for-php-passwords

make sure to use hash_hmac if it is available to make the operation harder to reproduce. Future Practices Coming in PHP 5.5 is a..

Use PHP to create, edit and delete crontab jobs?

http://stackoverflow.com/questions/4421020/use-php-to-create-edit-and-delete-crontab-jobs

usage crontab u user file crontab u user e l r default operation is replace per 1003.2 e edit user's crontab l list user's crontab..

New self vs. new static

http://stackoverflow.com/questions/5197300/new-self-vs-new-static

static self refers to the same class whose method the new operation takes place in. static in PHP 5.3's late static bindings refers..

PHP: Warning: sort() expects parameter 1 to be array, resource given [duplicate]

http://stackoverflow.com/questions/6169146/php-warning-sort-expects-parameter-1-to-be-array-resource-given

the data you need and on which you can perform a sort operation . See the manual for the use of mysql_query http nl3.php.net..

What is the best way to stop people hacking the PHP-based highscore table of a Flash game

http://stackoverflow.com/questions/73947/what-is-the-best-way-to-stop-people-hacking-the-php-based-highscore-table-of-a-f

game is 666 so let's find 666 in memory then catch any operation that touches that value oh look the high score encryption code.. messing with attackers by Scrambling the AES keys with XOR operations Replacing key byte arrays with functions that calculate the..