PHP strpos() Function

by Online Tutorials Library July 22, 2022

PHP strpos() Function

The strops() is in-built function of PHP. It is used to find the position of the first occurrence of a string inside another string or substring in a string.

Syntax:

Parameter	Description	Required/Optional
string	Specify the string to search.	Start
find	Specify the string to find.	Required
start	Specify where to begin the search.	Optional

This function will help us to find the numeric position of the first occurrence of needle in the haystack string

Note: The strops() function is case-sensitive and binary-safe.

Example 1

  <?php    $str1=”Hello Php”;      $str2=”Hello Php TutorAspire!”;      echo “First string is: “.$str1;      echo “<br>”;      echo “First string is: “.$str2;      echo “<br>”;      echo “By using ‘strpos()’ function:”.strpos(“$str1,$str2″,”php”);      //$str1 and $str2 ‘Php’first letter is upper case so output is nothing.      // It is case-sensitive  ?>  

Output:

First string is: Hello Php  First string is: Hello Php TutorAspire!  By using 'strpos()' function:

Example 2

  <?php      $str1=”Hello php”;      $str2=” Hello php TutorAspire!”;      echo “First string is: “.$str1;      echo “<br>”;      echo “First string is: “.$str2;      echo “<br>”;      echo “By using ‘strpos()’ function:”.strpos(“$str1,$str2″,”php”);      //Find the position of the first occurrence of “php” inside the string  ?>  

Output:

First string is: Hello php  First string is: Hello php TutorAspire!  By using 'strpos()' function:6

Example 3

  <?php  $mystring = ‘Hello PHP’;  $findme   = ‘Hello’;  $pos = strpos($mystring, $findme);    // Note our use of ===.  Simply == would not work as expected  // because the position of ‘Hello’ was the 0th (first) character.  if ($pos === false) {      echo “The string ‘$findme’ was not found in the string ‘$mystring'”;  } else {      echo “The string ‘$findme’ was found in the string ‘$mystring'”;      echo “<br>”;      echo ” and exists at position $pos”;  }  ?>  

Output:

The string 'Hello' was found in the string 'Hello PHP'  and exists at position 0

PHP strpos() Function

PHP strpos() Function

Syntax:

Note: The strops() function is case-sensitive and binary-safe.

Example 1

Example 2

Example 3

See Also:

PHP strchr() function

Java InetAddress class

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