PHP - MySQL
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» Marius
Hello
I want to make a Select SQL query that sorts ascending by a column, but the rows with NULL values to come last.
This is the query I use (but...
Last post » Admin
Hello
You could use the ISNULL() function:
$sql = SELECT * FROM mp_tab WHERE col < 50 ORDER BY (ISNULL(col) OR col =''), col ASC ;
Or, in the...
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» PloMar
Hello,
Let say I have records into a MySQL table with IDs: 3, 5, 8, 9, 13; and I want to be able to go from one to another by navigation via...
Last post » MarPlo
Hi,
Try this SQL code that combines two sql statements into one.
SELECT * FROM table_name
WHERE (
id = IFNULL((SELECT MIN(id) FROM table_name...
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» PloMar
How can I add a method to a stdClass object?
For example I try this code:
$ob = new stdClass;
$ob->prop = 'val';...
Last post » Admin
You cannot dynamically add a method to the stdClass and execute it in the normal way.
But you can assign that object method to a variable, then...
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» PloMar
I have the following object in php:
$ob = new stdClass;
$ob->name = 'some-name';
$ob->email = 'email-address';
$ob->site = '
How can I...
Last post » Admin
Hi,
Just use the: (array) $objectName construction.
$ob = new stdClass;
$ob->name = 'some-name';
$ob->email = 'email-address';...
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» PloMar
Hello,
I have a script that the user can upload and delete images on server. The issue I am running into is that when the user changes his image on...
Last post » Admin
Hi,
The simpliest way to force a refresh /reload of that image after upload is to add an unique ?hash to the URL /SRC adress (src=...
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» Marius
Hi,
I have this php exercise:
- Calculate the final sum of the digits of a number, till get a number with one digit.
For example:
$nr = 458;
//...
Last post » sandy
Another example with a recursive function:
<?php
function add($nr) {
$nr = array_sum(str_split($nr));
if(strlen($nr) == 1) return $nr;...
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» PloMar
Hello,
I have the following method to update data in MySQL table.
public function update($table, $rows){
foreach($rows as $k => $v) {...
Last post » Admin
Hi,
Try this code:
public function update($table, $rows){
$set = [];
foreach($rows as $k => $v) {
$set[] = $k='$v' ;
}
$sql = ...
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» Marius
Hi
I have a table in mysql database, with 3 columns: id | title | description .
The id column is INT AUTO_INCREMENT .
Does anyone know how to...
Last post » sandy
Hi,
If you're using PDO, use PDO::lastInsertId();// To Display the last Inserted value
If you're using MySql, use mysql_insert_id();// To Display...
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» PloMar
Hi,
I have the following code that uses DOMDocument to get some data from a html string in PHP.
// string with HTML content...
Last post » MarPlo
Hi,
The nodeValue attribute gives you the combined text of all the child nodes.
To get the text value of the first child text node only, use:...
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» PloMar
I wrote a PHP code to insert some data in to MySQL database. I want to display a message indicating whether the records are successfully added to the...
Last post » sandy
try {
$db_user = 'root';
$db_pass = 'pass';
$db = new PDO( 'mysql:host=localhost;dbname=the_db', $db_user, $db_pass );...
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» PloMar
Hello,
I have the following code that saves on the server a png image generated with php.
In that image I add a text (using imagettftext()), but...
Last post » MarPlo
Hi,
You can use the imagettfbbox() function, it returns an array with 8 elements representing four points making the bounding box of the text....
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» PloMar
Hello,
How can I save the content of the current php page into a html file, only after a form is submitted?
For example, I have the following code...
Last post » MarPlo
If you want to save the page content after a form is submitted, another way is to add the page code into a hidden field in that form, with JavaScript...
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» PloMar
I have the following Select in MySQL:
$sql = SELECT * FROM table_1 WHERE rank = 2 AND id IN(2, 5, 8) ;
But the IDs (2, 5, 8, ...) must be from a...
Last post » MarPlo
You can use multiple Select statements in the same SQL query.
Try this query, using a sub-select that selects the IDs.
$sql = SELECT * FROM table_1...
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» PloMar
I have two text fields, one for the date in 08/21/2012 format and a second field containing the time in the format 09:41am .
How can I end up...
Last post » MarPlo
On the database side, you can use:
- STR_TO_DATE() to convert into a database friendly format.
SELECT STR_TO_DATE(CONCAT('08/21/2012', '09:41am'),...
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» PloMar
I want to insert a DateTime object in database (created in PHP) where the column type is DateTime. How can I do?
I am using this code:
$cdate = new...
Last post » MarPlo
Use the Y-m-d H:i:s date-time format in PHP, it is the format of the DateTime column in MySQL.
$cdate = new DateTime('now');...
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» PloMar
Hello
How can I replace the new lines with a single space in a string in PHP?
For example I have this $str variable with a string content with...
Last post » Admin
You can use str_replace() with PHP_EOL.
Example:
$str = 'First line
Second row
Other line ...';
$str = str_replace(PHP_EOL, ' ', $str);
echo $str; ...
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» PloMar
What's the best way to delete a directory with all its files in it?
I'm using rmdir(PATH . '/' . $value); to delete a folder, however, if there are...
Last post » Admin
This function will allow you to delete any folder (as long as it's writable) and it's files and subdirectories:
function deleteDir($path) {...
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» PloMar
I try to parse a JSON file using PHP. The data in this JSON is in a two-dimensional object, like this:
{
John : {
status : Wait
},
Jennifer :...
Last post » Admin
To iterate over a multidimensional array, you can use RecursiveArrayIterator.
$string = file_get_contents('/dir/test.json');...
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» MarPlo
How can I detect which request type was used (GET, POST, PUT or DELETE) in a php script?
Last post » Admin
Simple use $_SERVER .
$request = $_SERVER ;
echo $request;
if($request === 'GET') {
// ...
}
else if($request === 'POST') {
// ...
}...
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» MarPlo
I have a PHP array as follows:
$aray = array(312, 'string', 1599, 'other val');
$del_val = 1599;
I want to delete the element containing the value...
Last post » Admin
You can use array_search() and unset(), like in this example:
$aray = array(312, 'string', 1599, 'other val');
$del_val = 1599;...
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» MarPlo
What is the best way to validate an email address in PHP?
I currently use preg_match() with a RegExp:
$email = 'some_name@domain.com';...
Last post » Admin
The easiest and safest way to check whether an email address is well-formed is to use the filter_var() function:
$email = 'some_name@domain.com';...
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» MarPlo
I am trying to select all rows from a table where column contains a character from a list: Something like:
SELECT * FROM table WHERE column...
Last post » Admin
Try with REGEXP, and escape everything with backslash. Result: .
SQL:
SELECT * FROM table WHERE column REGEXP ' '
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» MarPlo
I want to search in mysql database with columns containing some specified names and the column has values like:
Varsus GmbH (default)
Varsus...
Last post » Admin
Try this Select:
SELECT * FROM table WHERE
suppliername = 'Varsus'
OR (
suppliername LIKE '%Varsus%'
AND suppliername LIKE '%default%'
)
- The...
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» MarPlo
In login.php it is set a session ID for the logged user. Something simple:
<?php
session_start();
// check login data received from a form .....
Last post » Admin
Store a timestamp in the session.
In login.php , register a session with the expired timestamp (when you want to expire that session) in the same...
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» MarPlo
Hello,
I have two array one is 1 to 8 number of cards and four colors of cards.
$no = array(1, 2, 3, 4, 5, 6, 7, 8);...
Last post » Admin
Hi,
Use nested foreach() loops:
$no = array(1, 2, 3, 4, 5, 6, 7, 8);
$color = array('K','L','F','C');
$result = array();
foreach ($no as $n) {...
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