String
A string is a sequence of characters.
There are some functions those are as follows:
<?php
echo str_word_count("Hello world!");
?>
str_replace() function replaces some characters with some other characters in a string.
<?php
str_replace() function replaces some characters with some other characters in a string.
<?php
echo str_replace("world", "Dolly", "Hello world of php");
?>
<?php
strpos() function searches for a specific text within a string.
<?php
<?php
echo strpos("Hello world of php", "world"); //
?>
strrev() function reverses a string.
<?php
echo strrev("Hello world of php");
?>
strlen() function returns the length of a string.
<?php
<?php
$str = " Hello World! ";
<?php
<?php
strlen() function returns the length of a string.
<?php
echo strlen("Hello world of php");
?>
explode() It is used to break a string into an array.
<?php
<?php
$msg = "Hello world of php.";
print_r (explode(" ",$msg);
?>
htmlentities() It is used to convert characters to HTML entities.
This function returns:
htmlentities() It is used to convert characters to HTML entities.
htmlspecialchars() function converts special characters into HTML entities.
It converts all pre-defined characters to HTML entities as follows:
& (ampersand) : &
" (double quote):"
' (single quote): '
< (less than): <
> (greater than): >
There is also a htmlspecialchars_decode(), which is vice-versa of the htmlspecialchars() function.
md5() It is used to calculate the MD5 hash of a string.
strcmp() This function compares two strings and tells whether a string is greater, less, or equal to another string. strcmp() function is a binary safe string comparison
It converts all pre-defined characters to HTML entities as follows:
& (ampersand) : &
" (double quote):"
' (single quote): '
< (less than): <
> (greater than): >
There is also a htmlspecialchars_decode(), which is vice-versa of the htmlspecialchars() function.
md5() It is used to calculate the MD5 hash of a string.
strcmp() This function compares two strings and tells whether a string is greater, less, or equal to another string. strcmp() function is a binary safe string comparison
This function returns:
0 - if the two strings are equal
<0 - if string1 is less than string2
>0 - if string1 is greater than string2
>0 - if string1 is greater than string2
<?php
echo strcmp("Hello world!","Hello world!");
?>
trim() used to strip whitespace from the beginning and end of a string or both sides of a string.
$str = " Hello World! ";
echo "Without trim: " . $str,"<br>";
echo "With trim: " . trim($str);
?>
ucwords() function that returns a string converting the first character of each word into uppercase.
echo ucwords("hello world");
?>
ouput:
Hello World
strtolower() function returns a string in the lowercase letter.
<?php
echo strtolower("Hello WORLD!");
?>
strtoupper() function returns a string in the uppercase letter.
<?php
echo strtoupper("Hello WORLD!");
?>
wordwrap
<?php
$msg = "An example of the wordwrap() function to break the string";
$width = 5;
echo wordwrap($strinn1, $width, "<br>");
?>
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