---
title: "Some Important String function in PHP"
description: "There are lots of string functions which are used in PHP. In this article I will described some important string function which is widely used in PHP."
author: "Anonymous User"
published: 2011-09-06
updated: 2019-09-07
canonical: https://www.mindstick.com/articles/718/some-important-string-function-in-php
category: "php"
tags: ["php"]
reading_time: 3 minutes
---
# Some Important String function in PHP
There are lots of string [functions](https://www.mindstick.com/forum/34086/jquery-callback-functions) which are used in PHP. In this [article](https://yourviews.mindstick.com/view/81489/kashmir-now-after-an-year-of-abrogation-of-article-370) I will described some important [string function](https://www.mindstick.com/articles/719/php-string-function) which is widely used in PHP. Let’s we have a brief description about it.\
##### trim() function:
The trim() function removes whitespaces and other predefined [characters](https://answers.mindstick.com/qa/42112/who-is-the-originator-of-avengers-characters) from both sides of a string.
**Syntax:** trim (string name, charlist);
##### Example:
```
Trim Demo Before Trim: ". $lenDemo."" ; echo "After Trim :
". trim($lenDemo).""; echo "String with Special Character before trim
".$specStr.""; echo "String without Special Character after trim :
" . trim($specStr, "@"); ?>
```
##### Output:
##### fprintf() function:
The fprintf() function writes a formatted string to a specified output stream (example: file or database).
The arg1, arg2 parameters will be inserted at percent (%) signs in the main string. This function works "step-by-step". At the first % sign, arg1 is inserted, at the second % sign, arg2 is inserted, etc.
Syntax: fprintf (stream, format, arg1, arg2,…)
Note: %s is used for print string value and %u is used for unsigned decimal value;
##### Example:
```
Formatted String
```
##### Output:
And the test.txt file is:
##### sprint() function :
The sprintf() function writes a formatted string to a variable.
The arg1, arg2, ++ parameters will be inserted at percent (%) signs in the main string. This function works "step-by-step". At the first % sign, arg1 is inserted, at the second % sign, arg2 is inserted, etc.
Syntax: sprint(format, arg1,arg2,…)
##### Example:
```
Formatted String
```
##### Output:
##### vprintf() function:
vprintf() function outputs the formatted string. It works as sprint, fprintf, but there is little bit [difference](https://www.mindstick.com/articles/157114/good-news-or-bad-news-and-the-difference-is) in syntax. Let’s see.
**Syntax:** vprintf ([format](https://www.mindstick.com/forum/162083/how-to-convert-ost-files-into-pst-format), argarray)
##### Example 1(a):
```
Formatted String
```
##### Output:
##### Example 1(b):
```
Formatted String
```
##### Output:
[Form](https://yourviews.mindstick.com/view/87344/explained-the-benefits-of-short-form-videos) above example it is clear that you can [print](https://www.mindstick.com/blog/301752/types-of-3d-printing-technology) formatted string without using ‘echo’ statement.
\
---
Original Source: https://www.mindstick.com/articles/718/some-important-string-function-in-php
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