anupamsaha

Yes, I know that I didn't take the reverse order into account as that can be checked by swapping the two strings from the combination.

That's correct. Text file will have lines with strings in it and not array. Actually, the text file will have the strings those MUST be in the array. But, the array might have some words those are not part of the actual string. Make sense?

Thanks @xyph for your note. Let me elaborate my problem here. I have a text file where the actual strings are stored. By "actual", I mean the strings to be searched. These strings are combination of two strings. Now, I have another array where all thestrings are scrambled. Text file (wordlists.txt) milliontrillion unitdecimal crossstraight sumdivide ... The scrambled array: array('divide', 'trillion', 'decimal', 'million', 'straight', 'sum', 'unit',....); I want to traverse through the array and concatenate two strings and mark which are the strings are found from the text file. Any idea about such traversing algorithm which is fast? Thanks!

Hello, I have an array as follows: $a = array('a1', 'b1', 'c1'); // this can grow to 1000+ strings as array elements My objective is to traverse through the array quickly and create combination of strings taking two at a time. This means, the following will be the output: array(array('a1','b1'), array('a1','c1'), array('b1','c1')); // no need to create the reverse combinations I wrote the following code to achieve the same, but it's really really slow for a long array (for say, number of elements 1000+) <?php $words = array('a1', 'b1', 'c1'); $result = array(); do { $word1 = array_shift($words); foreach($words as $word2) { $result[] = array($word1, $word2); } } while(count($words)>0); print_r($result); ?> Can anybody help me to implement a faster solution for this? Thanks!

Read the eval() in PHP http://php.net/manual/en/function.eval.php. But, be very careful because anybody can input any PHP command to blow your server. Sanitize users' input before you use them.

Here you go <table> <tr> <td>Enter function y prime:</td> <td><input type="text" size="50" maxlength="" name="yprime" value="<?php echo (isset($_POST['yprime']) ? $_POST['yprime'] : '')?>" /></td> </tr> <tr> <td>Enter number of partitions:</td> <td><input type="text" size="7" maxlength="7" name="partitions" value="<?php echo (isset($_POST['partitions']) ? $_POST['partitions'] : '')?>" /></td> </tr> <tr> <td>Enter initial x value, x(0):</td> <td><input type="text" size="3" maxlength="3" name="initialx" value="<?php echo (isset($_POST['initialx']) ? $_POST['initialx'] : '')?>" /></td> </tr> <tr> <td>Enter the ending x value:</td> <td><input type="text" size="3" maxlength="3" name="endingx" value="<?php echo (isset($_POST['endingx']) ? $_POST['endingx'] : '')?>" /></td> </tr> <tr> <td>Enter initial y value, y(0):</td> <td><input type="text" size="3" maxlength="3" name="initialy" value="<?php echo (isset($_POST['initialy']) ? $_POST['initialy'] : '')?>" /></td> </tr> </table>

Seems you have missed to check whether the form is posted or not. Here is the code that I edited. Let us know if it works or not. <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post"><?php function dydx($x,$y){ $equation = 3 * pow($x, 2); return $equation; } ?> <table> <tr> <td>Enter number of partitions:</td> <td><input type="text" size="7" maxlength="7" name="partitions" value="" /></td> </tr> <tr> <td>Enter initial x value, x(0):</td> <td><input type="text" size="3" maxlength="3" name="initialx" value="" /></td> </tr> <tr> <td>Enter the ending x value:</td> <td><input type="text" size="3" maxlength="3" name="endingx" value="" /></td> </tr> <tr> <td>Enter initial y value, y(0):</td> <td><input type="text" size="3" maxlength="3" name="initialy" value="" /></td> </tr> </table> </br> <input type="submit" name="runge kutta name" value="Run Program" /> <?php if ($_SERVER['REQUEST_METHOD'] == 'POST' ) { // make sure that the form is posted $partitions = $_POST['partitions']; $initialx = $_POST['initialx']; $endingx = $_POST['endingx']; $initialy = $_POST['initialy']; if ($_POST['partitions'] != 0) { $h = ($endingx - $initialx)/$partitions; } $a[1] = $initialx; $b[1] = $initialy; for ($i = 1; $i <= $partitions; $i++) { $k1 = dydx($a[$i], $b[$i]); $k2 = dydx($a[$i] + (1/2)*$h, $b[$i] + (1/2)*$h*$k1); $k3 = dydx($a[$i] + (1/2)*$h, $b[$i] + (1/2)*$h*$k2); $k4 = dydx($a[$i] + $h, $b[$i] + $h*$k3); $a[$i + 1] = $a[$i] + $h; $b[$i + 1] = $b[$i] + (1/6)*$h*($k1 + 2*$k2 + 2*$k3 + $k4); } for ($i = 1; $i <= $partitions + 1; $i++) { $xyarray["$a[$i]"] = $b[$i]; } $_SESSION['graph'] = $xyarray; ?> </br> </br> Choose a partition of X: <select name="output"> <?php for ($i = 1; $i <= $partitions + 1; $i++) { echo "<option value=\"$a[$i]\">$a[$i]</option>\n"; } } // if ($_SERVER['REQUEST_METHOD'] == 'POST' ) ends ?> </form>

Moderator has indicated to write full English instead of the shorter version like 'd' for 'the' etc. Each forum has a decorum of communicating with others. Please follow the same as the moderator suggested. What error do you see at the end?

Seems a big mess is there already. I would suggest to take backup of your scripts and uninstall MySQL, PHP, Apache, EasyPHP and then install EasyPHP again.

Yes. Only install EasyPHP.

EasyPHP is a WAMP package including the scripting language PHP, the web server Apache, the SQL server MySQL, as well as easy development tools such as the database manager PhpMyAdmin and the debugger Xdebug. Nothing to configure. It's already done!

Please provide the code here.

Did you close the single quote correctly? $db->query = 'SELECT * FROM users WHERE user_name = :name AND user_role = :role'; // I have closed the single quote

The issue that you are facing due to duplicate form element name "Submit" for both the submit button and captcha input text. The submit button overrides the value of captcha field. Change <td><input type="text" name="Submit" value="what's the result?" onclick="this.value=''" /></td> To <td><input type="text" name="security" value="what's the result?" onclick="this.value=''" /></td> Also, change if($_POST['Submit'] != $_SESSION['security_number']) To if($_POST['security'] != $_SESSION['security_number'])

Yes. You can. I have done this and sure about it. What's the issue that you are facing?