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 $input_string = "sravan kumar author at geeks for geeks " ;
//sub string to be checked $sub = "geeks" ;
// Test if string contains the word if ( strpos ( $input_string , $sub ) !== false)
{ echo "True" ;
} else { echo "False" ;
} ?> |
Output:
True
Example 2:
PHP
<?php //input string $input_string = "sravan kumar author at geeks for geeks " ;
//sub string to be checked $sub = "computer" ;
// Test if string contains the word 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 $input_string = "geeks for geeks java python php" ;
//sub string to be checked $sub = " " ;
// Test if string contains the word if ( strpos ( $input_string , $sub ) !== false)
{ echo "True" ;
} else { echo "False" ;
} ?> |
Output:
True
Example 4:
PHP
<?php //input string $input_string = "geeks for geeks java python php" ;
//sub string to be checked $sub = " dbms" ;
// Test if string contains the word if ( strpos ( $input_string , $sub ) !== false)
{ echo "True" ;
} else { echo "False" ;
} ?> |
Output:
False