php string functions

Strlen()

To get length of string.

Example

<?php

 $str = "welcome";

Echo strlen($str);
?>

<?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);
?>

<?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);
?>

<?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);
?>

<?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);
?>

<?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));
?>

<?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);
?>

<?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);
?>

<?php

$str = "codelack";

Echo htmlspecialchars($str);

Output:

codelack

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);
?>

<?php

$str ="welcome " ;

$str1 =addslashes($str);

Echo $str1;

Echo stripslashes($str1);

Output:-

Wel\come

Welc’ome