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PHP - Set Variables In A Function
Hello, I am trying to define some variables in a function, but the variable just returns null no matter what I do. Could someone please tell me what I'm doing wrong?
Code: [Select] <?php function checkname() { global $t; if($_SESSION['name'] == '') { return false; $t = false; } elseif(isset($_POST['cont']) && $_SESSION['name'] != '') { return true; $t = true; } } var_dump($t); // returns NULL upon correct or incorrect submit. ?> Similar TutorialsI have a script that uses two functions and a simple switch statement. If I wanted to take the value of variables from function 1 and use them in function 2, would I have to declare them global in both functions, function 1, function 2, or outside the functions? For example Code: [Select] <?php function function_1() { //Here? global $variable_1; $variable_1 = hello world; return $variable_1 } function function_2() { //Or Here? global $variable_1; echo $variable_1 } //Or here? global $variable_1 //Or in all three places? I want the variable to be available everywhere in the script! ?> Hello I have a table with four variables. By choosing each of the variables we obtain a numerical value. I have a form with each of the variables to be selected and what I meant was that it appeared the value without having to place the table on page. step I (VAR 1) VAR2 VAR3 8h 10h 12h 14h 16h 18h(VAR4) A 0-30 4 2 1 1 2 4 A >30 1 3 2 4 5 3 B 0-30 7 6 4 6 4 3 B >30 4 5 3 6 3 5 C 0-30 2 2 2 2 1 8 C >30 8 8 5 6 2 2 D 0-30 6 9 8 2 8 8 D >30 5 5 6 8 6 8 step II (VAR1) VAR2 VAR3 8h 10h 12h 14h 16h 18h(VAR4) A >30 2 3 5 8 2 6 B >30 2 8 2 9 8 8 C >30 8 9 2 8 5 2 D >30 8 2 1 8 2 9 step I and step II is the first variable, then we have to see if it was A, B or C (second variable) and perhaps more complicated if the input value is between 0 - 30 or >30 (third variable) in stage I or greater than zero (third variable) in step II. The four variable was the hours. Have any suggestions on how I do this? Thanks I have a php script. I defined a variable outside of a function, but i cannot echo the variable inside the function. When I execute this: <?PHP $testvar = "test worked!"; testfunction(); function testfunction(){ echo $testvar; } ?> Nothing happens. what am i doing wrong. I did this on my local host. Apache running on Windows Vista Ultimate 32 bit Edition. Thanks in advance. Hello I've have read that global variables should not be used. so if i have 2 .php files: index.php - main content php file sitefunctions.php - php functions site file on my index.php page i have the following (an example of my problem): <?php displayError($errorID); ?> and in the sitefunctions.php file i have the following (an example of my problem): <?php function displayError($errorID) { if($errorID == 1) { echo "Password Failure"; } else { echo "Other Failure"; } } ?> now that works but since when first accesing that page the $errorID is not set then i get an error. How can i achieve this without first setting a blank $errorID global variable? Thanks Hello everyone, Can someone show me a way how to pass $_post variable from a form to a function? So, input username and input password to a function login($username, $password).
I have a php file with a bunch of variables declared. I now need a function to put data on a separate page that pulls variables from the required page.
<?php
function getplayer($position)
{ // start function
//$new_position = "$" . $position;
$new_position = $position;
$file = "their.php";
require "$file";
//echo $qb1; this displays the name John Doe...as $qb1 is declared in the required file
$db_select_their = "bschultz_their";
$servername = "localhost";
$username = "user";
$password = "pass";
$dbname = "db_name";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT * FROM (select number as position_number, name as position_name, pronunciation as position_pronunciation, pos as position_pos, height as position_height, weight as position_weight, year as position_year, city as position_city, state as position_state, notes as position_notes FROM $db_select_their WHERE name = '$new_position') as position";
//$sql = "SELECT * FROM bschultz_their WHERE name = $new_position";
echo $sql; //exit;
/*
this displays this text... SELECT * FROM (select number as position_number, name as position_name, pronunciation as position_pronunciation, pos as position_pos, height as position_height, weight as position_weight, year as position_year, city as position_city, state as position_state, notes as position_notes FROM bschultz_their WHERE name = '') as position
The name is empty
*/
$result = $conn->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
echo "#: " . $position_number . " - Name: " . $position_name . "";
}
} else {
echo "0 results";
}
} // end function
getplayer("${$qb1}");
$conn->close();
?>
Edited September 8, 2019 by bschultz
Hey guys, I want to pass the unique id of a node to a function when that image is clicked. Actually i am a newbee in php so don't know what to search about or where to look for it,but find this place and you all guys so helpful so i am asking for a guide here Hey ive been wanting to know how to make a function call another function which will then create a variable which i can send back to first function where i can use it. I tried somthing like this Code: [Select] <?php a(); function a($wall) { b(); echo $wall; } function b() { $wall = "test"; #a($wall); } ?> Thats what i tried but ofcourse didnt work, how would i go about doing this? Thanks. Okay I have a function that stores data into an Array. The function takes about 7 seconds to run and through a number of different loops it creates one final array with about 15,000 keys. I want to recall this data a number of times in different functions, however how can I have this data easily accessible without running the function each time. EX: Code: [Select] function theFunction() { for($x=0;$x,=15000;$x++) { //Run the loop and store data. $string[$x] = //output from other loops and calculations } return $string } //Then later on if I want to recall the data the only way I know how is to do the follow: $newstring = theFunction() The only problem I have with this is that it has to re-run the function every time in order to get to the data it spits out. How can I store this data into another array outside of the function without having to re-run it? I hope this makes sense. Thanks. I have the array defined and print_r (outside the function is show what I need...) However, I need to somewhay pass those three arguments - name, price, shipping (keys & values) into the "all_products" function and assign (inside the function) each element to a variable {name, price, shipping}. Code: [Select] function all_products($key,$value) { # This is where I'm lost - I know the values are passed to the function but how to I assign them to below variable? echo "$name"; echo "$price"; echo "$shipping"; // Products array defined to send values into "all_products" function & loop to display item name & individual pricing (using WHILE LOOP) $products = array('Product1' => array ( 'name' => 'item one', 'price' => '30.00', 'shipping' => '0.00'), 'Product2' => array ( 'item two', 'price' => '19.50', 'shipping' => '0.10'), 'Product3' => array ( 'item three', 'price' => '21.99', 'shipping' => '0.10') ); while (list($keys, $values) = each($products)) { while (list($k, $v) = each($values)) echo "Checking Looped Data Outside Function: <strong>$k: </strong> $v<br/>"; # echo "<pre>"; # print_r($value); # echo "</pre>"; # Trying to send array elements into "all_products" function & echo (name, price, shipping) keys and values inside that function all_products($k,$v); } Hello, my global variable is getting whacked (defined null or being undefined) after a function call. I'm not sure if it's happening when leaving the function that assigns it or when the form is "posted", or something else. Code: [Select] <? //global variables $globalVarString = ""; //function definitions function displayResults() { global $globalVarString; if ($globalVarString == "") {displayForm("please enter your search string again");} else {displayForm("you typed: $globalVarString");} } function getResults($searchInput) { global $globalVarString; $globalVarString = $searchInput; //give status ?> <html><head><title>Search</title></head><body> <form action="<?=$_SERVER['PHP_SELF']?>" method="post"> Thanks for entering your data (<? echo "$globalVarString" ?>).<br><br>Please press the submit button to process your data    <input type="Submit" value="Submit" name="processQuery"> </form></body></html> <? } function displayForm($message) { //prompt for input ?> <html><head><title>Search</title></head><body> <form action=" <? $_SERVER['PHP_SELF'] ?>" method="post"> <h3>Please enter your search <input type="text" name="searchString">    <script type="text/javascript">document.forms[0].searchString.focus();</script> <input type="Submit" value="Submit Query" name="searchQuery"></h3> </form> <? if (!$message == ""){echo "<br>    <h4>" . $message . "</h4><br>";} ?> </body></html> <? } //main() if(array_key_exists('searchQuery', $_POST)) {getResults($_POST['searchString']);} elseif (array_key_exists('processQuery', $_POST)) {displayResults();} else {displayForm("");} ?> Hello all, I have a 14 column csv that I load into an array, retrieving only the required fields, load the array into columns and perform a sort: Code: [Select] foreach ($array as $key => $row) { $firstname[$key] = $row["firstn"]; $lastname[$key] = $row["lastn"]; $address1[$key] = $row["addr1"]; $address2[$key] = $row["addr2"]; $address3[$key] = $row["addr3"]; $city[$key] = $row["cit"]; $stateprov[$key] = $row["state"]; $country[$key] = $row["cntry"]; $membernumber[$key] = $row["num"];} array_multisort($membernumber,$lastname,$firstname,$address1,$address2,$address3,$city,$stateprov,$country,$array);When I pass say the first three letters of a last name ($find = "smi"), all records matching the search criteria are returned: Code: [Select] foreach ($array as $key => $row) { if (strncasecmp($find, $lastname[$key], strlen($find)) == 0) { echo "<tr><td>" . $firstname[$key] . "</td>"; echo "<td>" . $lastname[$key] . "</td>"; echo "<td>" . $address1[$key] . "</td>"; echo "<td>" . $address2[$key] . "</td>"; echo "<td>" . $address3[$key] . "</td>"; echo "<td>" . $city[$key] . "</td>"; echo "<td>" . $stateprov[$key] . "</td>"; echo "<td>" . $country[$key] . "</td>"; echo "<td>" . $membernumber[$key] . "</td></tr>" . chr(13); }}}So far so good. However, I'd like to put the search part into a function so I can call it a number of times without having to reload the entire csv: Code: [Select] function FindMember() { foreach ($array as $key => $row) { if (strncasecmp($find, $membernumber[$key], strlen($find)) == 0) { echo "<tr><td>" . $firstname[$key] . "</td>"; echo "<td>" . $lastname[$key] . "</td>"; echo "<td>" . $address1[$key] . "</td>"; echo "<td>" . $address2[$key] . "</td>"; echo "<td>" . $address3[$key] . "</td>"; echo "<td>" . $city[$key] . "</td>"; echo "<td>" . $stateprov[$key] . "</td>"; echo "<td>" . $country[$key] . "</td>"; echo "<td align='right'>" . $membernumber[$key] . "</td></tr>" . chr(13); }}}}The search criteria would come from a second txt file with every line containing 2 numbers, separated by a comma: Code: [Select] foreach ($lines as $member => $numbers) { $exploded = explode(",", $numbers); $find = $exploded[1]; FindMember();here $exploded[1] corresponds to $membernumber[$key], so this is where I would call the function, but this is where I run into trouble, nothing gets returned. Does this have something to do with the scope of variables inside a user-defined function? I'd appreciate it if someone could point me in the right direction. TIA I am trying to pass a variable from inside of a function in a file that is included eg include.php Code: [Select] <? function noms(){ $foobar = "apples"; } ?> main.php Code: [Select] <? include("include.php"); noms(); echo "these ". $foobar. " are most delicious... OM NOM NOM"; ?> I am essentially using a include file for a mysql connection and based on the connection outcome i am either setting a value to true or false. It prints "Connected succesfully" and what not just fine, but, after that it wont pass on the variables data. I know its the function because, it passes the data if i put the variable before the function... i just dont get it.. any help would be great. Thanks. Ansel does anyone know how to decode this XML variable value into string values? I also need to know the oposite way: creating variable values into xml. I've tried several code examples but they did filter the requested data. Code: [Select] $xml='<?xml version="1.0" encoding="utf-8"?> <elements> <text identifier="ed9cdd4c-ae8b-4ecb-bca7-e12a5153bc02"> <value/> </text> <textarea identifier="a77f06fc-1561-453c-a429-8dd05cdc29f5"> <value><![CDATA[<p style="text-align: justify;">Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>]]></value> </textarea> <textarea identifier="1a85a7a6-2aba-4480-925b-6b97d311ee6c"> <value><![CDATA[<p style="text-align: justify;">Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>]]></value> </textarea> <image identifier="ffcc1c50-8dbd-4115-b463-b43bdcd44a57"> <file><![CDATA[images/stories/red/cars/autobedrijf.png]]></file> <title/> <link/> <target/> <rel/> <lightbox_image/> <width><![CDATA[250]]></width> <height><![CDATA[187]]></height> </image> <text identifier="4339a108-f907-4661-9aab-d6f3f00e736e"> <value><![CDATA[Kramer 5]]></value> </text> <text identifier="ea0666d7-51e3-4e52-8617-25e3ad61f8b8"> <value><![CDATA[6000 RS]]></value> </text> <text identifier="90a18889-884b-4d53-a302-4e6e4595efa0"> <value><![CDATA[Eindhoven]]></value> </text> <text identifier="410d72e0-29b3-4a92-b7d7-f01e828b1586"> <value><![CDATA[APK Pick up and return]]></value> </text> <text identifier="45b86f23-e656-4a81-bb8f-84e5ea76f71f"> <value><![CDATA[15% korting op grote beurt]]></value> </text> <text identifier="3dbbe1c6-15d6-4375-9f2f-f0e7287e29f3"> <value><![CDATA[Gratis opslag zomerbanden]]></value> </text> <text identifier="2e878db0-605d-4d58-9806-8e75bced67a4"> <value><![CDATA[Gratis abonnement of grote beurt]]></value> </text> <text identifier="94e3e08f-e008-487b-9cbd-25d108a9705e"> <value/> </text> <text identifier="73e74b73-f509-4de7-91cf-e919d14bdb0b"> <value/> </text> <text identifier="b870164b-fe78-45b0-b840-8ebceb9b9cb6"> <value><![CDATA[040 123 45 67]]></value> </text> <text identifier="8a91aab2-7862-4a04-bd28-07f1ff4acce5"> <value/> </text> <email identifier="3f15b5e4-0dea-4114-a870-1106b85248de"> <value/> <text/> <subject/> <body/> </email> <link identifier="0b3d983e-b2fa-4728-afa0-a0b640fa34dc"> <value/> <text/> <target/> <custom_title/> <rel/> </link> <relateditems identifier="7056f1d2-5253-40b6-8efd-d289b10a8c69"/> <rating identifier="cf6dd846-5774-47aa-8ca7-c1623c06e130"> <votes><![CDATA[1]]></votes> <value><![CDATA[1.0000]]></value> </rating> <googlemaps identifier="160bd40a-3e0e-48de-b6cd-56cdcc9db892"> <location><![CDATA[50.895711,5.955427]]></location> </googlemaps> </elements>'; Hi. I have some code which needs to return a single variable from the function and stored as a variable within this page, so it can be echoed later on in the page. I couldn't get it to return as a variable, so i used "return compact();" to return the variable and "extract (myFunction());" to extract it to variables. However, when I turned on php's display errors and error reporting function, I got an error message saying "Warning: extract() [function.extract]: First argument should be an array in /my/web/site/index.php on line 6" (which is where my extract function is). This works fine with passing more than one variables through, is there another way pass one variable from a function to be stored as a variable on the page which called the function? Here is the function: Code: [Select] <?php //This is a list of numeric error codes against their text. this will return the error code as the variable $issue function checkLoginIssue() { //If there is an error code if (isset($_GET["issue"])) { //cycle through the list until the code is reached, return the text and break the switch switch ($_GET["issue"]) { case "1": $issue = '<p class="warning">Please log in to view this page</p>'; break; case "2": $issue = '<p class="warning">Wrong Username or Password</p>'; break; case "3": $issue = '<p class="warning">No user found with those details</p>'; break; } //return the variable in an array with a single value return compact('issue'); } } ?> And here is the code which calls the function: Code: [Select] <?php extract(checkLoginIssue()); ?> Hello all, I have some piece of code that is nested like this $variable = 'This is a global argument'; function parentFunction($variable) { function childFunction() { echo 'Argument of the parent function is '.$GLOBALS['variable']; } childFunction(); } parentFunction(5); What I want to know is - Is there a way to access a variable from the parent function without passing arguments to the child function? (Something like how classes have parent::?). I don't want to use $GLOBALS because it might cause some variable collision, and I didn't want to pass arguments because incase I decide to change the arguments in the parent function I'd have to do it in the child function aswell. From my searching around in the Internet it seems like this is not possible, but if theres a slight chance that there might be something out there, i'm willing to give it a shot . Thanks in advance I have this function completely written in my class file that I am working on. The point to this function is to be able to check the login of a user or administrator for either of the control panels associated with my site. It will check the session intime as well as the page / module referenced. Once it passes all those checks, it will check and ensure the emailaddress/password stored in the current session still holds true and the account is still active... if the account is still active it will update the lastActivity as well as update all of the session variables with what is currently in the database. What I am looking for is basically a look at the function, see if it looks good.. If there is any part to it that could create security holes for the site just off the login function itself... Usage: $q->validUser($_SESSION['user'], $_mod); <?php function validUser($sess, $p) { if ($sess['inTime'] == '' && $p != 'login' && $p != 'logout') { session_destroy(); $login = '0'; $_int = ''; return $login; } else if ($sess['inTime'] < time()-3600 && $p != 'login') { $sess['inTime'] = ''; session_destroy(); $this->check_login($sess, $p); } else { $this->user = $sess['emailAddress']; $this->pass = $sess['password']; $login = $this->sql_query("SELECT * FROM users WHERE emailAddress = '".$this->user."' AND password = '".$this->pass."' AND status = '1' LIMIT '1'"); if ($login = $this->sql_numrows($login) < 1) { $sess['inTime'] == ''; session_destroy(); $login = '0'; } else { // logged in, lets update the database for last_activity AND the session. $this->sql_query("UDATE users SET lastActivity = '".now()."' WHERE emailAddress = '".$this->user."'"); $login = $this->sql_query("SELECT * FROM users WHERE emailAddress = '".$this->user."' AND password = '".$this->pass."' AND status = '1' LIMIT '1'"); $login = mysql_fetch_assoc($login); foreach ($login as $key => $value) { $sess[$key] = $value; } $sess['inTime'] = time(); $login = '1'; } return $login; } } ?> That is the main function, sql_query and sql_numrows is: <?php function sql_query($query = "", $transaction = FALSE) { unset($this->query_result); if ($query != "") { $this->num_queries++; if ($transation == BEGIN_TRANSACTION && !$this->in_transation) { $result = mysql_query("BEGIN", $this->db_connect_id); if (!$result) { return false; } $this->in_transaction = TRUE; } $this->query_result = mysql_query($query, $this->db_connect_id); } else { if ($transaction == END_TRANSACTION && $this->in_transaction ) { $result = mysql_query("COMMIT", $this->db_connect_id); } } if ($this->query_result) { unset($this->row[$this->query_result]); unset($this->rowset[$this->query_result]); if ($transaction == END_TRANSACTION && $this->in_transaction ) { $this->in_transaction = FALSE; if (!mysql_query("COMMIT", $this->db_connect_id)) { mysql_query("ROLLBACK", $this->db_connect_id); return false; } } return $this->query_result; } else { if ($this->in_transaction ) { mysql_query("ROLLBACK", $this->db_connect_id); $this->in_transaction = FALSE; } return false; } } function sql_numrows($query_id = 0) { if(!$query_id) { $query_id = $this->query_result; } return ($query_id) ? mysql_num_rows($query_id) : false; } ?> Any insight that can help to benefit these functions would be appreciated. Question 1) Is the only and proper way to call a parent function "parent::function()"? Are there other/better ways from within a child function? Question 2) What are the deciding factors for when to make a function or attribute static? How do you make that decision? Assuming 5.3... Thanks. I need to call usort from a class function, and I'm puzzled about how to define the comparison function. I've tried to define the comparison function in the same class, but I can't get usort to call it. I found one hint that it will work if I make the comparison function static, but I tried that, and it didn't work for me. If I define the comparison function outside the class, it won't have access to object properties that it needs to operate. The only solution I can think of is to define the comparison function outside the class and put the object properties it needs in globals. Is there a cleaner way to do this? |
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