PHP Modify Strings

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PHP Modify Strings

PHP has a set of built-in functions that you can use to modify strings.

<h2>php Modify Strings</h2>
<p>From w3schools.com, Experiment by Teeratus_R </p>
<h4>Upper Case</h4>
<p>The strtoupper() function returns the string in upper case:</p>
<?php
$x = "Hello World!";
echo strtoupper($x);
?>
<h4>Lower Case</h4>
<p>The strtolower() function returns the string in lower case:</p>
<?php
$x = "Hello World!";
echo strtolower($x);
?>
<h4>Replace String</h4>
<p>The str_replace() function replaces some characters with some other characters in a string.</p>
<?php
$x = "Hello World!";
echo str_replace("World", "Dolly", $x);
?>
<h4>Reverse a String</h4>
<p>The PHP strrev() function reverses a string.</p>
<?php
$x = "Hello World!";
echo strrev($x);
?>
<h4>Remove Whitespace</h4>
<p>Whitespace is the space before and/or after the actual text, and very often you want to remove this space.</p>
<?php
$x = "  Hello   World!  ";
echo $x . "<br>"; 
echo trim($x);
?>

Example 1

Result View Example

PHP Convert String into Array

<h2>php Convert String into Array</h2>
<p>The PHP explode() function splits a string into an array.

The first parameter of the explode() function represents the "separator". The "separator" specifies where to split the string.</p>
<?php
$x = "Hello World!";
$y = explode(" ", $x);

//Use the print_r() function to display the result:
print_r($y);

/*
Result:
Array ( [0] => Hello [1] => World! )
*/
?>

Example 2

Result View Example

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