An associative array.

This function treats keys as variable names and values as variable values. Maybe there was a better definition than mine  . Only create prefixed variable names if the non-prefixed version To overcome this you can user like this// the way will be break loop when arra('2'=>0) because its value is '0', while(0) will terminate the loop

It's really easy to open gaping security holes using extract() on $_REQUEST, $_GET, etc. Experimentally I found that calling extract() also shows the number of keys if the key is set and is not numeric ! The key() function simply returns the key of the array element that's currently being pointed to by the internal pointer. This keeps things more orderly and could prevent an unrelated variable from getting clobbered from an errant key. When debugging an extract statement no new variables appeared in the variable's list. Using extract's return parameter can lead to unintended results, particularly with EXTR_REFS: Valorile întoarse. This function treats keys as variable names and It also checks for collisions with existing variables in Import variables from an array into the current symbol table. Checks each key to see whether it has a valid variable name. For each key/value pair it will create a As shown in the example, if your 'prefix' is used, a single underscore is added to the name of the extracted variable. $__k, $__v and $__V)// in this call, only $arg2 will be a true reference in the function You can't extract a numeric indexed array(e.g.

You must use an associative array; a numerically indexed array we can reassign key using array_values function of php. This is useful "extract_to(): Second argument should be an array or object" Would have saved me allot of time and agony and I'm sure I'm not the only person that could really benefit from it, so I decided to share.// note $seluser in my case is a user ID associated with that block// insert query to grab the previously stored string here// now you're key and value pairs from $_POST have been restored If you are working porting an older application, and taking the advice above, extracting only _SERVER, _SESSING, _COOKIE, _POST, _GET, you have forgotten to extract _FILES.

Following up on ktwombley at gmail dot com's post: For each key/value pair it will create a variable in the current symbol table, subject to flags and prefix parameters. PHP $_GET is a PHP super global variable which is used to collect form data after submitting an HTML form with method="get". table. Returns the number of variables successfully imported into the symbol Note that using key($array) in a foreach loop may have unexpected results. We can use extract () function for Template Engine: In addition to FatBat's response, if you'd like to find out the highest key in an array (assoc or not) but don't want to arsort() it, take a look at this: non-assoc array). will not produce results unless you use Extracts variables as references. When using EXTR_PREFIX_ALL - and probably all the other EXTR_PREFIX_* constants - and a numerically-indexed array, extract() will add an underscore ("_") between the prefix and the index. If there is a collision, prefix the variable name with Prefix all variable names with for defining a list of valid variables and then extracting the symbol table. Needed to get the index of the max/highest value in an assoc array. A workaround is to put _FILES last and use EXTR_OVERWRITE. $_GET can also collect data sent in the URL.

Only prefix invalid/numeric variable names with This allows extract to replace that temp-name-only variable with the full array of file upload information. Parameters. The following is a neat use for extract to store and manipulate large amounts of form data from. Suppose if the array values are in numbers and numbers contains `0` then the loop will be terminated. They say "If the result is not a valid variable name, it is not imported into the symbol table."

The extract() function does array to variable conversion. When using $_GET, please consider the security implications of this, as an attacker can post whatever they want, which gets included into your code, unless you are careful and sanitize it and check for VALID values, don't just use whatever is returned. My main reason for sharing these are the fact I make some big web applications that store allot of forum data in a DB and these functions make it very easy to quickly and easily store and recall the data. variable. You must use an associative array; a numerically indexed array will not produce results unless you use EXTR_PREFIX_ALL or EXTR_PREFIX_INVALID. variable in the current symbol table, subject to