PHP String Function
1- stripcslashes()

This function remove backslashes from the string.

Return Type :- string

<?php
echo stripcslashes("I a\m U\ser");
?>

Output:-
I am User

2- md5()

md5(Message-Digest algorithm 5) return 32-digit hexadecimal number for every string. This function use RSA Data Security.

Return Type :- string

<?php
$str="pass1234";
echo md5($str);
?>

Output :-
b4af804009cb036a4ccdc33431ef9ac9

Note : This function is use for security purpose. Just like password field. User can store password generated by md5() function value.

3- ucfirst()

This function convert first character of the string(sentences) into uppercase.

Return Type :- string

Example 3:-

<?php
echo ucfirst("php tutorial");
?>

Output :-
Php tutorial

4- ucwords()

This function convert first character of the string(single word) into uppercase.

Return Type :- string

Example 4:-

<?php
echo ucwords("php tutorial");
?>

Output :-
Php Tutorial

5- explode()

This function convert string into array of the strings. And the string is split by the delimeter. here delimeter is space.

Return Type :- array

Example 5:-

<?php
$str = "This is test script";
$array_str=explode(" ",$str);
for($i=0;$i<count($array_str);$i++)
{
echo $array_str[$i]."<br>";
}
?>

Output :-
This
is
test
script

6- implode()


This function convert array into string.

Return Type :- string

Example 6:-

<?php
$array_str = array("This","is","test","script");
$str=implode(" ",$array_str);
echo $str;
?>

Output :-
This is test script

7- substr()

This function returns the portion of the string from the string. and user specified the start location and number characters

Return Type :- string

Example 7:-

<?php
echo substr('shishir',3,2);
?>

Output :-
sh

8- htmlspecialchars

This function is use to print special characters like
less than(<),greater than equal to (>=)

Note :- We can also print HTML Tag like
<b>test</b>
<img src="my.gif" /> etc.


Return Type :- string

Example 8:-

<?php

echo htmlspecialchars("<a href='#'>Click Here</a>");

?>

Output :-
<a href='#'>Click Here</a>

9- number_Format()

This function is use for format the number with grouped thousands By this number look like english notation , French notation etc.

look this function carefully
number_format(number,decimals,decimalpoint,separator)

Return Type :- string

Example 9:-

<?php
$number = 1239464.5647;

echo number_format($number);
echo "<br>";
echo number_format($number,2);
echo "<br>";
echo number_format($number, 2, '.', ' ');
echo "<br>";
echo number_format($number, 2, '.', '');
?>

Output :-
1,239,465
1,239,464.56
1 239 464.56
1239464.56


10- strcmp()

This function compare two string. if both string match then strcmp function return 0
otherwise returns any interger value. Note:- comparison is case sensitive.

Return Type :- int

Example :-

<?php
$str1="shishir";
$str2="shishir";
echo strcmp($str1,$str2);
?>

Output :-
0

Some Important String function(We have discuss these function in previous classes)

addcslashes() :- add backslashes in front of the string (character is specified by user).
Return type (string)

addslashes() :- add backslashes in front of the string (character is specified by predefined).
Return type (string)

chr() :- return the ASCII value of character.
Return type (string)

chunk_split() :- Split a string into series of smaller parts.
Return type (string)

ltrim() :- Remove space from left side of the string.
Return type (string)

rtrim() :- Remove space from right side of the string.
Return type (string)

trim() :- Remove space from left and right both side
Return type (string)

stripslashes() :- Remove backslashes that is add by addslashes.
Return type (string)

strrev() :- This function reverse the string.
Return type (string)

strlen() :-
This function find length of the string. length means total number of character.
Return type (int)


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Line Number: 202

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