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Truncating an Array in PHP
How To Truncate an Array in PHP? If you want to remove a chunk of values from an array, you can use the array_splice($array, $offset, $length) function. $offset defines the starting position of the chunk to be removed. If $offset is positive, it is counted from the beginning of the array. If negativ...
2017-01-05, 394👍, 0💬

XHTML 'meta' Elements Not Closed
What Happens If an XHTML "meta" Element Is Not Closed? Meta tags, link tags and base tags must be closed in XHTML documents. If you forget to close them like the HTML format, you will get validation errors. Try the following tutorial sample XHTML document on http://validator.w3.org/ to see what type...
2017-06-28, 392👍, 0💬

HTML 'base' Tag/Element
What Is the HTML "base" Tag/Element? The "base" element is an optional sub-element of the "head" element. The "base" element specifies a base URL for all the hyper links in XHTML document. It has one required attribute called "href" to allow you to specify the base URL. Here is an example: &lt;?...
2017-06-23, 392👍, 0💬

HTML 'strong' Tag/Element
What Is an HTML "strong" Tag/Element? A "strong" element is an inline element that you can use to specify text with a strong emphasis. Here are basic rules about "strong" elements: "strong" elements are inline elements. "strong" elements can not be used at block level. Contents of "strong" elements ...
2017-04-28, 391👍, 0💬

Default File Name of a URL
What Happens If File Name is Missing in a URL? If the file name part is missing in a URL, the one of the following two rules will be used. 1. If a URL has no file name, but a path name is given, the browser will let the hosting computer to supply the default file name. On most hosting computers, the...
2017-07-07, 389👍, 0💬

Incorrect HTML 'head' Element
What Is Wrong with This XHTML "head" Element? If you have trouble passing the XHTML 1.0 validation on your head element, check the following common mistakes: Missing the title element. Not closing the meta element as &lt;meta ... &gt;. You must close all elements in XHTML documents. Not clos...
2017-06-28, 388👍, 0💬

HTML 'table' Tag/Element
What Is a "table" Tag/Element? A "table" element is a block level element that you can use to present information in table of rows and columns. Here are basic rules about "table" elements: "table" elements are block elements. "table" elements can not have empty contents. "table" elements can not hav...
2017-05-20, 388👍, 0💬

'cellspacing' - White Spaces between HTML Table Cells
How To Control White Spaces between Table Cells? White spaces between cells refer to the vertical space between a upper cell and a lower cell in a table column, and the horizontal space between a left cell and a right cell in a table row. If inner borders are turned on, white spaces between cells ap...
2017-05-13, 388👍, 0💬

Relative Path Name of a URL
What Is a Relative Path Name? A relative path name is a path name that starts without the leading slash "/". If a relative path name is used in a URL, the relative path name will be replaced with the current document path name appended with the specified relative path name. If "." or ".." is used in...
2017-07-07, 387👍, 0💬

Getting Minimum/Maximum Value of an Array in PHP
How To Get the Minimum or Maximum Value of an Array in PHP? If you want to get the minimum or maximum value of an array, you can use the min() or max() function. Here is a PHP script on how to use min() and max(): &lt;?php $array = array(5, 7, 6, 2, 1, 3, 4, 2); print("Minimum number: ".min($arr...
2016-12-28, 387👍, 0💬

$_GET, $_POST and $_REQUEST in PHP
Where Is the Submitted Form Data Stored in PHP? When a user submit a form on your Web server, user entered data will be transferred to the PHP engine, which will make the submitted data available to your PHP script for processing in pre-defined arrays: $_GET - An associate array that store form data...
2016-11-15, 387👍, 0💬

Hyper Link Indexes within the HTML Document
How To Build Hyper Link Indexes within the Same Document? If you want build some hyper link indexes within the same document, you need use "a" elements to define some bookmarks, then use "a" elements to define hyper links that pointing to those bookmarks. The tutorial example below shows you how to ...
2017-07-03, 385👍, 0💬

HTML Un-ordered List Item Markers
How To Use Different Markers on Unordered List Items? By default, browsers will use solid dots as the item markers for unordered lists. If you want to change them to something else, like tiny squares, you need to use CSS properties. Here is a tutorial example showing you how to set item markers to b...
2017-05-20, 385👍, 0💬

What Is a Session ID in PHP
What Is a Session ID in PHP? A session ID is an identification string of a session. Since there might be multiple visitors coming to your Web site at the same time, the PHP engine needs to maintain multiple sessions concurrently. Session IDs are created and maintained by the PHP engine to identify s...
2016-10-26, 383👍, 0💬

Writing a String to a File without a File Handle in PHP
How To Write a String to a File without a File Handle in PHP? If you have a string, want to write it to a file, and you don't want to open the file with a file handle, you can use the file_put_contents(). It opens the specified file, writes the specified string, closes the file, and returns the numb...
2016-11-27, 382👍, 0💬

Merging Two Arrays into a Single Array in PHP
How To Merge Values of Two Arrays into a Single Array in PHP? You can use the array_merge() function to merge two arrays into a single array. array_merge() appends all pairs of keys and values of the second array to the end of the first array. Here is a PHP script on how to use array_merge(): &l...
2017-01-11, 380👍, 0💬

Hyper Link Points to a Music File
What Happens If a Hyper Link Points to a Music File? If you want to build a hyper link to allow visitors to access a music/sound file by clicking a hyper link, you can put the URL of the music/sound file directly in the "href" attribute of the hyper link. If a visitor clicks the link, the browser wi...
2017-07-03, 379👍, 0💬

Hyper Link Points to an Image
What Happens If a Hyper Link Points to an Image? If you want to build a hyper link to allow visitors to see an image by clicking a hyper link, you can put the URL of the image directly in the "href" attribute of the hyper link. If a visitor clicks the link, the browser will fetch and display the ima...
2017-07-03, 378👍, 0💬

Missing Cells in HTML Table Row
What Happens If One Row Has Missing Columns? What happens if one row has missing columns? Most browsers will provide empty columns to the end of the row to make up the missing columns. For example, if your XHTML document has a table with the first row having 2 columns, and the second row having 3 co...
2017-05-05, 378👍, 0💬

Retrieving All Keys from an Array in PHP
How To Get All the Keys Out of an Array in PHP? Function array_keys() returns a new array that contains all the keys of a given array. Here is a PHP script on how to use array_keys(): &lt;?php $mixed = array(); $mixed["Zero"] = "PHP"; $mixed[1] = "Perl"; $mixed["Two"] = "Java"; $mixed["3"] = "C+...
2017-01-21, 377👍, 0💬

Working with Directoris and Files in PHP
Where to find tutorials on how to Work with Directories and Files in PHP? A collection of tutorials to answer many frequently asked questions on how to Work with Directories and Files in PHP. Topics included in this collection are: Creating a Directory in PHP Removing an Empty Directory in PHP Remov...
2016-11-24, 377👍, 0💬

Defining an Array Argument as Reference in PHP
Can You Define an Array Argument as a Reference Type? in PHP? You can define an array argument as a reference type in the function definition. This will automatically convert the calling arguments into references. Here is a PHP script on how to define an array argument as a reference type: &lt;?...
2016-12-18, 376👍, 0💬

Sorting an Array by Values in PHP
How To Sort an Array by Values in PHP? Sorting an array by values is doable by using the sort() function. It will re-order all pairs of keys and values based on the alphanumeric order of the values. Then it will replace all keys with integer keys sequentially starting with 0. So using sort() on arra...
2017-01-21, 375👍, 0💬

Opening Standard Output as a File Handle in PHP
How To Open Standard Output as a File Handle in PHP? If you want to open the standard output as a file handle yourself, you can use the fopen("php://stdout") function. It creates a special file handle linking to the standard output, and returns the file handle. Once the standard output is opened to ...
2016-11-24, 375👍, 0💬

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