Php read more content

Create A Dynamic ‘Read More’ Link Using PHP

I am working on a dashboard similar to WordPress today, therefore there are many stories and each story has an excessive amount of details. I’ll learn here how to add ‘Read more’ link on each story.

I’m having trouble figuring out how to keep the dashboard page’s descriptions short. A show more link will appear to the user on many websites where the further words are hidden if the description text is longer than a few characters.

So I need to create “Read More…” link and if the user is interested then he can click on more link and see the full content.

You can also check other tutorials of dynamic read more Using jQuery

Here is a simple tutorial to achieve “Read More..” link functionality.

To create a link dynamically, I need first to create a connection with the database.

Created Database Connection With MySQLi

Created connect.php file into php application, We will pass MySQL server hostname, username, dbname and password into mysqli_connect() method.

$con = mysqli_connect(«localhost»,»my_user»,»my_password»,»my_db»); // Check connection if (mysqli_connect_errno())

Get All Records With MySqli

We will get all records with description data from the database.

Now I am creating a readMoreFunction(. ) general function to display link on the dashboard.

Above functionally has been created using of core php ,you can also create this functionality with jquery and PHP

I hope this will help you!

Источник

file_get_contents

This function is similar to file() , except that file_get_contents() returns the file in a string , starting at the specified offset up to length bytes. On failure, file_get_contents() will return false .

file_get_contents() is the preferred way to read the contents of a file into a string. It will use memory mapping techniques if supported by your OS to enhance performance.

Note:

If you’re opening a URI with special characters, such as spaces, you need to encode the URI with urlencode() .

Parameters

Note:

The FILE_USE_INCLUDE_PATH constant can be used to trigger include path search. This is not possible if strict typing is enabled, since FILE_USE_INCLUDE_PATH is an int . Use true instead.

A valid context resource created with stream_context_create() . If you don’t need to use a custom context, you can skip this parameter by null .

The offset where the reading starts on the original stream. Negative offsets count from the end of the stream.

Seeking ( offset ) is not supported with remote files. Attempting to seek on non-local files may work with small offsets, but this is unpredictable because it works on the buffered stream.

Maximum length of data read. The default is to read until end of file is reached. Note that this parameter is applied to the stream processed by the filters.

Return Values

The function returns the read data or false on failure.

This function may return Boolean false , but may also return a non-Boolean value which evaluates to false . Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

Errors/Exceptions

An E_WARNING level error is generated if filename cannot be found, length is less than zero, or if seeking to the specified offset in the stream fails.

When file_get_contents() is called on a directory, an E_WARNING level error is generated on Windows, and as of PHP 7.4 on other operating systems as well.

Changelog

Version	Description
8.0.0	length is nullable now.
7.1.0	Support for negative offset s has been added.

Examples

Example #1 Get and output the source of the homepage of a website

Example #2 Searching within the include_path

// If strict types are enabled i.e. declare(strict_types=1);
$file = file_get_contents ( ‘./people.txt’ , true );
// Otherwise
$file = file_get_contents ( ‘./people.txt’ , FILE_USE_INCLUDE_PATH );
?>

Example #3 Reading a section of a file

// Read 14 characters starting from the 21st character
$section = file_get_contents ( ‘./people.txt’ , FALSE , NULL , 20 , 14 );
var_dump ( $section );
?>

The above example will output something similar to:

Example #4 Using stream contexts

// Create a stream
$opts = array(
‘http’ =>array(
‘method’ => «GET» ,
‘header’ => «Accept-language: en\r\n» .
«Cookie: foo=bar\r\n»
)
);

$context = stream_context_create ( $opts );

// Open the file using the HTTP headers set above
$file = file_get_contents ( ‘http://www.example.com/’ , false , $context );
?>

Notes

Note: This function is binary-safe.

A URL can be used as a filename with this function if the fopen wrappers have been enabled. See fopen() for more details on how to specify the filename. See the Supported Protocols and Wrappers for links to information about what abilities the various wrappers have, notes on their usage, and information on any predefined variables they may provide.

When using SSL, Microsoft IIS will violate the protocol by closing the connection without sending a close_notify indicator. PHP will report this as «SSL: Fatal Protocol Error» when you reach the end of the data. To work around this, the value of error_reporting should be lowered to a level that does not include warnings. PHP can detect buggy IIS server software when you open the stream using the https:// wrapper and will suppress the warning. When using fsockopen() to create an ssl:// socket, the developer is responsible for detecting and suppressing this warning.

See Also

• file() — Reads entire file into an array
• fgets() — Gets line from file pointer
• fread() — Binary-safe file read
• readfile() — Outputs a file
• file_put_contents() — Write data to a file
• stream_get_contents() — Reads remainder of a stream into a string
• stream_context_create() — Creates a stream context
• $http_response_header

User Contributed Notes 6 notes

file_get_contents can do a POST, create a context for that first:

$opts = array( ‘http’ =>
array(
‘method’ => ‘POST’ ,
‘header’ => «Content-Type: text/xml\r\n» .
«Authorization: Basic » . base64_encode ( » $https_user : $https_password » ). «\r\n» ,
‘content’ => $body ,
‘timeout’ => 60
)
);

$context = stream_context_create ( $opts );
$url = ‘https://’ . $https_server ;
$result = file_get_contents ( $url , false , $context , — 1 , 40000 );

Note that if an HTTP request fails but still has a response body, the result is still false, Not the response body which may have more details on why the request failed.

There’s barely a mention on this page but the $http_response_header will be populated with the HTTP headers if your file was a link. For example if you’re expecting an image you can do this:

$mimetype = null ;
foreach ( $http_response_header as $v ) if ( preg_match ( ‘/^content\-type:\s*(image\/[^;\s\n\r]+)/i’ , $v , $m )) $mimetype = $m [ 1 ];
>
>

if (! $mimetype ) // not an image
>

if the connection is
content-encoding: gzip
and you need to manually ungzip it, this is apparently the key
$c=gzinflate( substr($c,10,-8) );
(stolen from the net)

//从指定位置获取指定长度的文件内容
function file_start_length($path,$start=0,$length=null) if(!file_exists($path)) return false;
$size=filesize($path);
if($start <0) $start+=$size;
if($length===null) $length=$size-$start;
return file_get_contents($path, false, null, $start, $length );
>

I’m not sure why @jlh was downvoted, but I verified what he reported.

>>> file_get_contents($path false, null, 5, null)
=> «»
>>> file_get_contents($path, false, null, 5, 5)
=> «r/bin»

Источник

How to Create Read More in PHP?

If you’re developing website with PHP to list multiple articles on home page. Then definitely you will need to display only few starting lines of each article content with “Read More…” link to display full article content in a page when click on “Read More…” link. It would be best approach to display “Read More” with each article because it will allow you to display more articles in a single page that will increase readability of page.

So here in this post, you will learn how to create “Read More…” link and clicking on it will display full content in a page.

Here is an example of creating read more link of content to display few line of content with “Read More…” and by clicking “Read More…” will display full content in page.

The below code will display content with few lines with “Read More…” link.

This is a readMore() function to create read more link of a content.

• Star Rating System with Ajax, PHP and MySQL
• Create Event Calendar with jQuery, PHP and MySQL
• Build Your Own CAPTCHA Script with PHP
• Convert Unix Timestamp To Readable Date Time in PHP
• Inventory Management System with Ajax, PHP & MySQL
• Create Live Editable Table with jQuery, PHP and MySQL
• Live Add Edit Delete datatables Records with Ajax, PHP and MySQL
• Stripe Payment Gateway Integration in PHP
• Export Data to Excel with PHP and MySQL
• Star Rating System with Ajax, PHP and MySQL
• Create Dynamic Bootstrap Tabs with PHP & MySQL
• How To Create Simple REST API in PHP

Here we have developed a complete read more script the help of above example code. You can see this script in action from below live demo link.

Источник