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how to use php string functions | example of string function

php string functions

Strlen()

To get length of string.

Example
 

<?php

 $str = "welcome";

Echo strlen($str);
?>

Output   : 7
 

Note   :-    ord() is used for getting ascii value.

Strtoupper()

Converts all character of a string  into upper case .

Example

<?php

 $str = "hello";

Echo strtoupper($str);
?>

Output; HELLO

Strtolower():

Converts characters of a string into lower case.

Ucfirst():

Converts first characters of a string into upper case.

Example :

 <?php

 $str = "codelack";

Echo ucfirst($str);
?>

Output  Codelack

Ucwords()

Converts  first character of all words into upper case.

Example :

<?php

  $str="codelack in php";

Echo ucwords($str);
?>

Output     Codelack In Php

Nl2br()

To break new lines of  string.

<?php
$str = "codelack New  tutarial Site ";

Echo nl2br($str);
?>

Output  :-

codelack New  tutarial Site

Str_word_count()

To get total number of words of a string.

We can pass node value. If node value is 0, it rerurns total no of words.

If node value is 2, it returns each word as array elements keys  the index numbers of words.

Example:

<?php

$str  = "welcome codelack tutorial  ";

Print_r(str_word_count($str,2));
?>

Output:

Array (

[0]=>welcome

[8]=>codelack

[14]=> tutorial

)

Strip_tags()

To strip HTML of a string.

Example

<?php

$str = "<input type=’button’ value=’click’>codelack";

Echo strip_tags($str);
?>

Output: –

Codelack

Htmlspecialchars()

To stop execution of html tags.

Example

<?php

 $str = "<b><i>codelack</i></b>";

Echo htmlspecialchars($str);
?>

Output:

<b><i>codelack</i></b>

Addslashes():

To add escape slashes (backslashes /) in front of single and double quotation.

Atripslashes()

To remove the slashes , which we added with add slashes function (addslashes()).

Example

<?php
$str ="welcome " ;
$str1 =addslashes($str);
Echo $str1;
Echo stripslashes($str1);
?>

Output:-

Wel\come

Welc’ome

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