How to get the file name suffix with php_PHP tutorial-PHP Tutorial-php.cn

How to get the file name suffix with php_PHP tutorial

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Release： 2016-07-21 15:07:50

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php gets the file suffix name (format file)

//Method 1:

Copy the code The code is as follows:

 function extend_1( $file_name ) 
{ 
 $retval = “” ; 
 $pt = strrpos ( $file_name , “.” ); 
 if ( $ pt ) $retval = substr ( $file_name , $pt +1, strlen ( $file_name ) - $pt ); 
 return ( $retval ); 
} 

//Method 2

Copy code The code is as follows:

function extend_2( $file_name ) 
{ 
$extend = pathinfo ( $file_name ); 
$extend = strtolower ( $extend [ "extension" ]); 
return $extend ; 
} 

//Method 3

Copy the code The code is as follows:

function extend_3( $file_name ) 
{ 
$extend = explode ( “.” , $file_name ); 
$va = count ( $extend )-1; 
return $extend [ $ va ]; 🎜> The code is as follows: 

function getFileExt( $file_name )
{ while ( $dot = strpos ( $file_name , “.” )) {
$ file_name = substr ($file_name, $dot +1); } return $file_name;

} ?> :PHP pathinfo() function PHP Filesystem function

Definition and usage 

pathinfo() function returns file path information in the form of an array. 

Syntax

pathinfo(path,options)

ParametersDescription
path
Required. Specifies the path to be checked.
process_sectionsOptional. Specifies the array elements to be returned. The default is all.
Possible values:
PATHINFO_DIRNAME – returns only dirname
PATHINFO_BASENAME – returns only basenamePATHINFO_EXTENSION – returns only extension
Description

pathinfo() returns an associative array containing path information. Includes the following array elements: [dirname]
[basename]
[extension]

Tips and commentsComments:
If not all units are required, the pathinfo() function returns a string. Example

Example 1

Copy code
The code is as follows:

// Output: // Array([dirname] => /testweb[basename] => test.txt[ extension] => txt)
Example 2

Copy code

The code is as follows:

// Output:

// test.txt

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www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327526.html

TechArticle

php gets the file suffix name (format file) //Method 1: Copy the code The code is as follows: ?php function extend_1( $file_name ) { $retval = "" ; $pt = strrpos ( $file_name , "." );...