shamuraq

March 18

14 minutes ago, Barand said:
You must be using an outdated version of php. Str_starts_with() requires version 8.

Use this instead
$required = array_filter($files, fn($v)=>substr($v, 0, 5) == 'alg00');

What does the values in 0,5 in substr($v, 0, 5) refers to?

March 18

32 minutes ago, Barand said:

Easier with str_starts_with()

$files = [  'alg001.php',
            'alg002.php',
            'alg003.php',
            'alg004.php',
            'alg005.php',
            'algComp.php',
            'ranFrac.php',
            'ranalg.php',
            'randec.php',
            'randint.php'
          ];
$required = array_filter($files, fn($v)=>str_starts_with($v, 'alg00'));
echo '<pre>' . print_r($required, 1) . '</pre>';

Gives

Array
(
    [0] => alg001.php
    [1] => alg002.php
    [2] => alg003.php
    [3] => alg004.php
    [4] => alg005.php
)

I tried as suggested:

$arrFiles = array();
$dirPath = "./";
$files = scandir($dirPath);
$required = array_filter($files, fn($v)=>str_starts_with($v, 'alg00'));
echo '<pre>' . print_r($required, 1) . '</pre>';

The error:

Fatal error: Uncaught Error: Call to undefined function str_starts_with() ...php:29 Stack trace: #0 [internal function]: {closure}('.') #1 /...php(29): array_filter(Array, Object(Closure)) #2 {main} thrown in ...php on line 29

March 18

Hi guysm

I have a folder containing these files:

alg001.php
alg002.php
alg003.php
alg004.php
alg005.php
algComp.php
ranFrac.php
ranalg.php
randec.php
randint.php

I would only like to store the names of files alg001.php, alg002.php, alg003.php, alg004.php, alg005.php into an array. How do i achieve this with preg match?

March 18

how do i convert the following script to adopt ternary operator to shorten it?

$radint = mt_rand(1,33);
    $flip = mt_rand(1,2);
    if($flip == 2){
        $radint *= -1;
    }

Thanx in advance.

March 12

11 hours ago, Barand said:

You've done the hard work already. Instead of calculating the product, store the selected array.

<?php
$primes = array(2, 3, 5, 7, 11, 13, 17, 19, 23);
$combos = [];

function getAllCombinations($arr, $n, &$combos, $selected = array(), $startIndex = 0) {
  if ($n == 0) {
      $combos[] = $selected;
//    $product = 1;
//    foreach ($selected as $prime) {
//      $pr[] = $prime;
//      $product *= $prime;
//      $pr[] = $prime;
//    }
//    echo "Product: $product\n";
    return;
  }

  for ($i = $startIndex; $i < count($arr); $i++) {
    $selected[] = $arr[$i];
    getAllCombinations($arr, $n - 1, $combos, $selected, $i + 1);
    array_pop($selected); // Backtrack and remove the element for next iteration
  }
}  

getAllCombinations($primes, 4, $combos);

echo '<pre>';
foreach ($combos as $com)  {
    printf("%-35s = %5d<br>", join(' &times; ', $com), array_product($com));    // output numbers and product
}

?>

giving

2 × 3 × 5 × 7     =   210
2 × 3 × 5 × 11    =   330
2 × 3 × 5 × 13    =   390
2 × 3 × 5 × 17    =   510
2 × 3 × 5 × 19    =   570
2 × 3 × 5 × 23    =   690
2 × 3 × 7 × 11    =   462
2 × 3 × 7 × 13    =   546
2 × 3 × 7 × 17    =   714
2 × 3 × 7 × 19    =   798
2 × 3 × 7 × 23    =   966
2 × 3 × 11 × 13   =   858
2 × 3 × 11 × 17   =  1122
2 × 3 × 11 × 19   =  1254
2 × 3 × 11 × 23   =  1518
2 × 3 × 13 × 17   =  1326
2 × 3 × 13 × 19   =  1482
2 × 3 × 13 × 23   =  1794
2 × 3 × 17 × 19   =  1938
2 × 3 × 17 × 23   =  2346
2 × 3 × 19 × 23   =  2622
2 × 5 × 7 × 11    =   770
2 × 5 × 7 × 13    =   910
.
.
5 × 17 × 19 × 23  = 37145
7 × 11 × 13 × 17  = 17017
7 × 11 × 13 × 19  = 19019
7 × 11 × 13 × 23  = 23023
7 × 11 × 17 × 19  = 24871
7 × 11 × 17 × 23  = 30107
7 × 11 × 19 × 23  = 33649
7 × 13 × 17 × 19  = 29393
7 × 13 × 17 × 23  = 35581
7 × 13 × 19 × 23  = 39767
7 × 17 × 19 × 23  = 52003
11 × 13 × 17 × 19 = 46189
11 × 13 × 17 × 23 = 55913
11 × 13 × 19 × 23 = 62491
11 × 17 × 19 × 23 = 81719
13 × 17 × 19 × 23 = 96577

Tes... Thats exactly what i wanted. But can you explain the breakdown of "%-35 = %5d <br>"?

March 11

I have a function randomly take 4 unique numbers from an array and multiply them. Problem with the script below is it only print out the products. I would like for each set of 4 numbers and its product to be in its own array and all the arrays into a main array, forming a 2 dimensional array. My current script:

//Pruning outcome from controlled lists of Prime Numbers
$primes = array(2, 3, 5, 7, 11, 13, 17, 19, 23);


function getAllCombinations($arr, $n, $selected = array(), $startIndex = 0) {
  if ($n == 0) {
    $product = 1;
    foreach ($selected as $prime) {
      $pr[] = $prime;
      $product *= $prime;
      $pr[] = $prime;
    }
    echo "Product: $product\n";
    return;
  }

  for ($i = $startIndex; $i < count($arr); $i++) {
    $selected[] = $arr[$i];
    getAllCombinations($arr, $n - 1, $selected, $i + 1);
    array_pop($selected); // Backtrack and remove the element for next iteration
  }
}  

getAllCombinations($primes, 4);

The output:

Product: 210 Product: 330 Product: 390 Product: 510, etc.

The preferred method is a 2 dimensional array as such:

[0][0] =>2 [0][1] =>3 [0][2]=>5 [0][3]=>7 and the product would be in [0][4] =>210

[1][0] =>2 [1][1] =>3 [1][2]=>5 [1][3]=>11 and the product would be in [1][4] =>330

etc.

Any pointers is greatly appreciated.

January 15, 2013

Hi guys,

I am trying to convert randomized float to fractions.

For eg; 66.666666666667 = 66 2/3

Any pointers?

November 10, 2012

Its like this:'

$value = array(
       array(3075,15,461.25,16,535.05),
       array(3075,15,461.25808,16,535.05),//to be removed
       array(3075,15,461.2,16,535.05234)//to be removed
);


$value = array_filter($value,
   function ($v) {
       foreach ($v as $x) {
           if (strlen(substr(strrchr($x, "."), 1)) > 2)
               return false;
       }
       return true;
   });


var_dump($value);

But nothing came out during testing. What could be wrong?

November 10, 2012

Hi guys,

I am looking fer a way to delete numbers with decimal values more than 2 decimal place in my arrays. Any pointers?

Thanx in advance.

October 19, 2012

Hi guys,

am not very good with regex. I need to replace all double backslashes '\\' in my string into single backslashes '\'. I tried:

$pattern = '[\\]';
$replacement = '/\/';

?>
       <td width="100%"> <?php echo preg_replace($pattern, $replacement,$q[$i]);?></td>

i also tried a few other combinations but the output is either blank or more backslashes are added. Any pointers are appreciated.

Thanx in advance.

January 22, 2012

Hi all,

I'm trying to list the possible combinations in fraction from 1/1 + 1/1 until 9/9 + 9/9. So i came up with this

<?php
//numbers of combination for w/x + y/z
$num1=1;
$den1=1;
$num2=1;
$den2=1;
$row=1;
for($w=0; $w<9; $w++){
echo $row.') ';
$row=$row+1;
echo $num1.'/'.$den1.' + '.$num2.'/'.$den2.'<br>';
$num1=$num1+1;

for($x=0; $x<9; $x++){
	echo $row.') ';
	$row=$row+1;
	echo $num1.'/'.$den1.' + '.$num2.'/'.$den2.'<br>';
	$den1=$den1+1;

	for($y=0; $y<9; $y++){
		echo $row.') ';
		$row=$row+1;
		echo $num1.'/'.$den1.' + '.$num2.'/'.$den2.'<br>';
		$num2=$num2+1;

		for($z=0; $z<9; $z++){
			echo $row.') ';
			$row=$row+1;
			echo $num1.'/'.$den1.' + '.$num2.'/'.$den2.'<br>';
			$den2=$den2+1;
		}
	}
}
}
?>

The problem is it parse all the way to

7380) 10/82 + 730/6561.

Where did it go wrong? Thanx in advance...

January 15, 2012

Solved it... I guess the problem is because am trying to store it in a variable...

But i changed to to

echo nl2br("$summary");

But am curious tho... Is there anyway to store it in a variable without causing those errors?

January 15, 2012

nl2br already coverts newlines to <br /> tags.

You shouldn't do this on the way into the database however, only on the way out.

Followed ur advice and removed the nl2br from the insert into sql file. But am still getting the same error.

January 15, 2012

Hi...

I read on php.net manual that its better to use str_replace than preg_replace. I used

$summary = clean($_POST['summary']);

$summary = nl2br($summary);

to convert the carriage return(is that the correct term?) to insert them into mysql. So naturally, i want them converted into <br> when i pull them from mysql.

I used this:

$num_rows=mysql_num_rows($result);
	if($num_rows == 0){
	}
	else{
		for($x = 0; $x < $num_rows; $x++){
		$row = mysql_fetch_assoc($result);
		$id = $row['id'];
		$position = $row['position'];
		$summary = $row['summary'];

$order   = array("\r\n", "\n", "\r");
$replace = '<br />';
$newstr = str_replace($order, $replace, $summary);

But i got this error:

Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in /home/...php on line 310

Is it a syntax error?

Thanx in advance...

January 12, 2012

thanx .josh. Really appreciate it...

January 7, 2012

I tried this

<?php
$string = 'what do u get 1/2?';
$pattern = '/(\d+) (/) (\d+)/i';
$replacement = '$1 | $3';
echo preg_replace($pattern, $replacement, $string);
?>

but i didn't work...

Nothing came out :-[

January 7, 2012

What do u get if 1/2 + 1/3?

How do i use preg replace to select the fractions part? I need to add html <strong> to bold only the fractions part. Is there regex involved?

January 6, 2012

Please advise me on what are the complications i could encounter if i do a table for every user? I am still learning the ropes and would appreciate the guidance...

January 2, 2012

yupp...

January 2, 2012

Hi guys,

I have been using the "CREATE TABLE IF NOT EXISTS" with no problem until today... It keeps on giving me error. So i logged in to my phpMyAdmin to test it out on the sql console and it responded with

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '"CREATE TABLE IF NOT EXISTS `email@email.com` ( `id` INT( 7 ) NOT NULL AUTO_IN' at line 1

this is the syntax that i used on phpMyAdmin:

"CREATE TABLE IF NOT EXISTS `email@email.com` (
	`id` INT( 7 ) NOT NULL AUTO_INCREMENT PRIMARY KEY ,
	`ref` VARCHAR ( 200 ) NOT NULL ,
	`date` VARCHAR(10) NOT NULL ,
	`time` VARCHAR(10) NOT NULL ,
	`action` TEXT  ,
	`score` VARCHAR(4),
	`credit_charge` INT( 4 ) NOT NULL ,
	) ENGINE = innodb;";

i referred to the error that phpMyAdmin returned (error #1064) and found out it highly likely the usage of reserved keyword (http://dev.mysql.com/doc/refman/5.0/en/reserved-words.html). But i cannot find any reserved keyword that i could've used in my query so far...

Any ideas?

December 6, 2011

If i would like to add this functionality to my app,

1.how do i go about installing?

2. Are the tutorials for this?

3. Could it be done on my localhost?

4. Could it be applied to a shared server without having to get the administrator to do it fer u?

I'm really a noob so i do apologise if i sound stupid...

Thanx guys...

May 23, 2011

can u describe the scenario in better detail?

May 23, 2011

The filetype has nothing to do with the error.

The problem is that this: $fileUpload = $_POST['fileUpload']; references an array index that doesn't exist. The data related to the file will be in the $_FILES array, not the $_POST array. Add the following at the top of the ulf-exec.php script to see the structure of both arrays:
echo '<pre>';
print_r($_POST);
print_r($_FILES);
echo '</pre>';

Thanx Pikachu... solved it... but its not over yet... i now need to script the streaming of the pdf from server...

Is there anyway we can calculate the max the pdf size should be to avoid straining the server?

May 23, 2011

I don't think you can read a pdf with php.

I believe you need something like this

http://www.fpdf.org/

No... i dun want php to read the pdf... Just want php to insert my pdf's into mysql blob...

May 22, 2011

Hi guys,

This is my first time to insert PDF into MySQL BLOB.

Below is my form that i used

<?php
<form enctype="multipart/form-data" name="frmUploadFile" action="ulf-exec.php" method="post">

<select name="title"  id="title">
                      <option>xxx</option>
                      <option>yyy</option>
                      <option>zzz</option>
                    </select>
                  </label>
<input name="des" type="text" class="dropdownlists1" id="des"></td>
<input name="fileUpload" type="file" class="dropdownlists1" id="fileUpload" size="20" border=""></td>
<input type="submit" name="button" id="button" value="Submit">

</form>
?>

I have prepared my database based on the required but decided to test with echo just to confirm there's no issue with the code

The action="ulf-exec.php" :

<?php

function clean($str) {
	$str = @trim($str);
	if(get_magic_quotes_gpc()) {
		$str = stripslashes($str);
	}
	return mysql_real_escape_string($str);
}

//Sanitize the POST values
$title = clean($_POST['title']);
$des = clean($_POST['des']);
$fileUpload = $_POST['fileUpload'];

if(empty($des) || $fileUpload == "none")

die("You must enter both a description and file");


$fileHandle = fopen($fileUpload, "r");
$fileContent = fread($fileHandle, $fileUpload_size);
$fileContent = addslashes($fileContent);


$date = date('d').'-'.date('m').'-'.date('y');
$time = date('h').':'.date('i').':'.date('s');

echo "<h1>File Uploaded</h1>";

echo "The details of the uploaded file are shown below:<br><br>";

echo "<b>File name:</b> $fileUpload_name <br>";

echo "<b>File type:</b> $fileUpload_type <br>";

echo "<b>File size:</b> $fileUpload_size <br>";

echo "<b>Uploaded to:</b> $fileUpload <br><br>";

echo "<a href='uploadfile.php'>Add Another File</a>";
?>

This is the error:

Warning: fopen() [function.fopen]: Filename cannot be empty in /ulf-exec.php on line 30

Warning: fread(): supplied argument is not a valid stream resource in ulf-exec.php on line 31

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shamuraq

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Posts posted by shamuraq

Using preg match to find specific cluster of files

Using preg match to find specific cluster of files

Using preg match to find specific cluster of files

Using ternary operator

How to output array instead of a 'loop' echo return from a function?

How to output array instead of a 'loop' echo return from a function?

Converting decimal to percentage

Looking Fer Ideas On Searching Array

Looking Fer Ideas On Searching Array

Help For Preg_Replace

Help with listing combinations using for loop

Help on str_replace

Help on str_replace

Help on str_replace

Preg replace help

Preg replace help

Preg replace help

Problem with CREATE TABLE IF NOT EXISTS

Problem with CREATE TABLE IF NOT EXISTS

Problem with CREATE TABLE IF NOT EXISTS

Typing math

PHP and Curl..............

PHP -> MYSQL - Inserting of PDF into BLOB

PHP -> MYSQL - Inserting of PDF into BLOB

PHP -> MYSQL - Inserting of PDF into BLOB

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