How to check if a String Contains a Substring in PHP ?
Last Updated :
30 Apr, 2021
A string is a collection of given characters and a substring is a string present in a given string.
In this article, we are going to check if the given string contains a substring by using the PHP strpos() function.
Syntax:
strpos($original_string,$sub_string);
Parameters:
- original_string : The input string
- sub_string : The substring searched in the original input string.
Return type: Boolean value
- True, If substring found
- False, If substring not found.
Example:
PHP
<?php
$input_string = "sravan kumar author at geeks for geeks ";
$sub = "geeks";
if (strpos($input_string, $sub) !== false)
{
echo "True";
}
else
{
echo "False";
}
?>
|
Output:
True
Example 2:
PHP
<?php
$input_string = "sravan kumar author at geeks for geeks ";
$sub = "computer";
if (strpos($input_string, $sub) !== false)
{
echo "True";
}
else
{
echo "False";
}
?>
|
Output:
False
Example 3: The following example also considers space.
PHP
<?php
$input_string = "geeks for geeks java python php";
$sub = " ";
if (strpos($input_string, $sub) !== false)
{
echo "True";
}
else
{
echo "False";
}
?>
|
Output:
True
Example 4:
PHP
<?php
$input_string = "geeks for geeks java python php";
$sub = " dbms";
if (strpos($input_string, $sub) !== false)
{
echo "True";
}
else
{
echo "False";
}
?>
|
Output:
False
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