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Deleting Existing Rows in PHP
How To Delete Existing Rows in a Table in PHP? If you want to remove a row from a table, you can use the DELETE statement with a WHERE clause to identify the row. The following sample script deletes one row: <?php include "mysql_connection.php"; $sql = "DELETE FROM fyi_links WHERE id = 1102"; if ...
2016-10-19, 234👍, 0💬

Uploading Files to Web Servers in PHP
Where to find tutorials on how to upload files to Web servers in PHP? A collection of tutorials to answer many frequently asked questions on how to upload files to Web servers in PHP. Clear explanations and tutorial exercises are provided on creating file upload HTML tags, setting encoding type on H...
2016-10-17, 267👍, 0💬

Querying Multiple Tables Jointly in PHP
How To Query Multiple Tables Jointly in PHP? If you want to query information stored in multiple tables, you can use the SELECT statement with a WHERE condition to make an inner join. Assuming that you have 3 tables in a forum system: "users" for user profile, "forums" for forums information, and "p...
2016-10-17, 245👍, 0💬

FORM Tag for Uploading Files in PHP
How To Write the FORM Tag Correctly for Uploading Files in PHP? When users clicks the submit button, files specified in the <INPUT TYPE=FILE...> will be transferred from the browser to the Web server. This transferring (uploading) process is controlled by a properly written <FORM...> tag...
2016-10-17, 241👍, 0💬

Processing Uploaded Files in PHP
How To Process Uploaded Files in PHP? How to process the uploaded files? The answer is really depending on your application. For example: You can attached the outgoing emails, if the uploaded files are email attachments. You can move them to user's Web page directory, if the uploaded files are user'...
2016-10-17, 237👍, 0💬

Retrieving the Last Auto Increment ID in PHP
How To Get the Last ID Assigned by MySQL in PHP? If you use an ID column with AUTO_INCREMENT attribute, you can use the mysql_insert_id() function to get the last ID value assigned by the MySQL server, as shown in the sample script below: <?php include "mysql_connection.php"; $sql = "INSERT INTO ...
2016-10-17, 237👍, 0💬

INPUT Tag for File Uploading in PHP
Which HTML Tag Allows Users to Specify a File for Uploading in PHP? To present an input field on your Web page to allow users to specify a local file to upload, you need to use the <INPUT TYPE="FILE" ...> tag inside a <FORM ...> tag. The <INPUT TYPE="FILE" ...> will be displayed as...
2016-10-17, 234👍, 0💬

What Is File Upload in PHP
What Is File Upload in PHP? File upload is Web page function which allows visitor to specify a file on the browser's system and submit it to the Web server. This is a very useful function for many interactive Web sites. Some examples are: Web base email systems for users to send attachments. Forums ...
2016-10-17, 234👍, 0💬

Setting ID Column as Auto-Incremented in PHP
How To Set the ID Column as Auto-Incremented in PHP? Many tables require an ID column to assign a unique ID number for each row in the table. For example, if you have a table to hold forum member profiles, you need an ID number to identify each member. To allow MySQL server to automatically assign a...
2016-10-17, 232👍, 0💬

Performing Key Word Search in PHP
How To Perform Key Word Search in Tables in PHP? The simplest way to perform key word search is to use the SELECT statement with a LIKE operator in the WHERE clause. The LIKE operator allows you to match a text field with a keyword pattern specified as '%keyword%', where (%) represents any number of...
2016-10-17, 230👍, 0💬

Getting Uploaded File Information in PHP
How To Get the Uploaded File Information in the Receiving Script in PHP? Once the Web server received the uploaded file, it will call the PHP script specified in the form action attribute to process them. This receiving PHP script can get the uploaded file information through the predefined array ca...
2016-10-17, 229👍, 0💬

Understanding PHP Arrays and Their Basic Operations
Where to find tutorials in Understanding PHP Arrays and Their Basic Operations? A collection of tutorials to answer many frequently asked questions on basic understanding of PHP arrays. Clear answers are provided with tutorial exercises on declaring and creating arrays, assigning and retrieving arra...
2016-10-15, 257👍, 0💬

What Is an Array in PHP
What Is an Array in PHP? An array in PHP is really an ordered map of pairs of keys and values. Comparing with Perl, an array in PHP is not like a normal array in Perl. An array in PHP is like an associate array in Perl. But an array in PHP can work like a normal array in Perl. Comparing with Java, a...
2016-10-15, 240👍, 0💬

Creating an Array in PHP
How To Create an Array in PHP? You can create an array using the array() constructor. When calling array(), you can also initialize the array with pairs of keys and values. Here is a PHP script on how to use array(): <?php print("Empty array:\n"); $emptyArray = array(); print_r($emptyArray); prin...
2016-10-15, 232👍, 0💬

Testing If a Variable Is an Array in PHP
How To Test If a Variable Is an Array in PHP? Testing if a variable is an array is easy. Just use the is_array() function. Here is a PHP script on how to use is_array(): <?php $var = array(0,0,7); print("Test 1: ". is_array($var)."\n"); $var = array(); print("Test 2: ". is_array($var)."\n"); $var...
2016-10-15, 231👍, 0💬

Retrieving Values out of an Array in PHP
How To Retrieve Values out of an Array in PHP? You can retrieve values out of arrays using the array element expression $array[$key]. Here is a PHP example script: <?php $languages = array(); $languages["Zero"] = "PHP"; $languages["One"] = "Perl"; $languages["Two"] = "Java"; print("Array with ins...
2016-10-15, 228👍, 0💬

Filtering Out Empty Files in PHP
Why Do You Need to Filter Out Empty Files in PHP? When you are processing uploaded files, you need to check for empty files, because they could be resulted from a bad upload process but the PHP engine could still give no error. For example, if a user typed a bad file name in the upload field and sub...
2016-10-14, 416👍, 0💬

Detecting File Uploading Errors in PHP
How To Detect File Uploading Errors in PHP? If there was a problem for a file upload request specified by the <INPUT TYPE=FILE NAME=fieldName...> tag, an error code will be available in $_FILES[$fieldName]['error']. Possible error code values are: UPLOAD_ERR_OK (0) - There is no error, the fil...
2016-10-14, 238👍, 0💬

Moving Uploaded Files to Permanent Directory in PHP
How To Move Uploaded Files To Permanent Directory in PHP? PHP stores uploaded files in a temporary directory with temporary file names. You must move uploaded files to a permanent directory, if you want to keep them permanently. PHP offers the move_uploaded_file() to help you moving uploaded files. ...
2016-10-14, 236👍, 0💬

Creating a Database Table to Store Files in PHP
How To Create a Table To Store Files in PHP? If you using MySQL database and want to store files in database, you need to create BLOB columns, which can holds up to 65,535 characters. Here is a sample script that creates a table with a BLOB column to be used to store uploaded files: <?php $con = ...
2016-10-14, 439👍, 0💬

Configuration Settings for File Upload in PHP
What Are the File Upload Settings in Configuration File in PHP? There are several settings in the PHP configuration file related to file uploading: file_uploads = On/Off - Whether or not to allow HTTP file uploads. upload_tmp_dir = directory - The temporary directory used for storing files when doin...
2016-10-14, 230👍, 0💬

Technical Specifications for File Upload in PHP
How To Get the Technical Specifications for File Upload in PHP? File upload technical specifications is provided in "Form-based File Upload in HTML - RFC 1867". You can get a copy from http://www.ietf.org/rfc/rfc186 7.txt.  ⇒Uploading Files to Web Servers in PHP ⇒⇒PHP Tutorials
2016-10-14, 225👍, 0💬

"new line" Character in Single-Quoted Strings in PHP
Can You Specify the "new line" Character in Single-Quoted Strings? You can not specify the "new line" character in a single-quoted string. If you don't believe, try this script: <?php echo '\n will not work in single quoted strings.'; ?> This script will print: \n will not work in single quote...
2016-10-13, 485👍, 0💬

Running a PHP Script
How To Run a PHP Script? A standard alone PHP script can be executed directly with the PHP Command Line Interface (CLI). Write the following script in a file called hello.php: <?php echo "Hello world!"; ?> This script can be executed by CLI interface like this: \php\php hello.php You should se...
2016-10-13, 395👍, 0💬

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