w3resource

PHP: substr() function

Description

The substr() function used to cut a part of a string from a string, starting at a specified position.

Version:

(PHP 4 and above)

Syntax:

substr(string_name, start_pos, length_to_cut)

Parameters:

Name Description Required /
Optional		 Type
string_name The input string. Required String
start_pos Refers to the position of the string to start cutting.
A positive number : Start at the specified position in the string.
A negative number : Start at a specified position from the end of the string.		 Required Integer
length_to_cut Length of the string to cut from the main string.
A positive number : Start at the specified position in the string.
A negative number : Start at a specified position from the end of the string.		 Optional Integer

Return value:

Returns the extracted part of string and false when failure.

Value Type: String.

Pictorial Presentation

string_substr

Example - 1: 

<?php
$string1="Welcome to w3resource.com";
echo $string1;
echo '<br>';
echo substr($string1,1);
echo '<br>';
echo substr($string1,1,5);
echo '<br>';
echo substr($string1,0,10);
echo '<br>';
echo substr($string1,-1,1);
echo '<br>';
?>

Output: 

Welcome to w3resource.com
elcome to w3resource.com
elcom
Welcome   to
m

View the example in the browser

Example - 2 : 

<?php
$string1="Welcome to w3resource.com";
echo $string1;
echo '<br>';
echo substr($string1,0,-1);
echo '<br>';
echo substr($string1,3,-3);
echo '<br>';
echo substr($string1,4,-4);
echo '<br>';
echo substr($string1,-3,-2);
echo '<br>';
?>

Output :

Welcome to w3resource.com
Welcome to w3resource.co
come to   w3resource.
ome to w3resource
c

View the example in the browser

Example - 3 :

<?php
$string1="Welcome to w3resource.com";
echo $string1;
echo '<br>';
echo substr($string1,-1);
echo '<br>';
echo substr($string1,-4);
echo '<br>';
echo substr($string1,-5,1);
?>

Output :

Welcome to w3resource.com
m
.com
e

View the example in the browser

See also

PHP Function Reference

Previous: substr_replace
Next: trim



PHP: Tips of the Day

Output a Multidimensional Array with index and value and print into the table

Example:

Array
(
 [0] => Array
 (
 [id] => 13
 [category_id] => 7
 [name] => Leaving Of Liverpool
 [description] => Leaving Of Liverpool
 [price] => 1.00
 [virtual] => 1
 [active] => 1
 [sort_order] => 13
 [created] => 2007-06-24 14:08:03
 [modified] => 2007-06-24 14:08:03
 [image] => NONE
 )

[1] => Array
 (
 [id] => 16
 [category_id] => 7
 [name] => Yellow Submarine
 [description] => Yellow Submarine
 [price] => 1.00
 [virtual] => 1
 [active] => 1
 [sort_order] => 16
 [created] => 2007-06-24 14:10:02
 [modified] => 2007-06-24 14:10:02
[image] => NONE
 )
)

<table>
<?php
foreach ($products as $key => $value) {
 foreach ($value as $k => $v) {
 echo "<tr>";
 echo "<td>$k</td>"; // Get index.
 echo "<td>$v</td>"; // Get value.
 echo "</tr>";
 }
}
?>
</table>