CODEWITHSUNDEEP
phpstring
Rahul Sharma
Rahul Sharma

Reputation: 87

how do i check for a string occurence in input data

I want to check for occurence of a particular string in user input data. How do I do it. Here's my code:

    <?php
    $data = $_POST["data"];

    if (strcmp("123",$data))
       echo "string matches";
    else if (strcmp("234",$data))
       echo "string 2 matches";
    else 
       echo"string does not match";
?>

Upvotes: 2

Views: 43

Answers (3)

sanjeev shetty
sanjeev shetty

Reputation: 458

Try this,

    <?php
        //$data = isset($_POST["data"])?$_POST["data"]:'';
        $data = "12356789";
        if (strpos($data, "123")!== false){
           echo "string matches";
        }
        else if (strpos($data, "234")!== false){
           echo "string 2 matches";
        } else {
           echo"string does not match";
        }
?>

Upvotes: 1

Will
Will

Reputation: 24699

If you want to check to see if $_POST['data'] contains the strings you're searching for, do this:

<?php
    $data = $_POST["data"];

    if (strpos($data, "123") !== false)
       echo "data contains 123";
    else if (strpos($data, "234") !== false)
       echo "data contains 234";
    else 
       echo "data does not contain either";

But, if you want to check for an exact match, you'd just do:

<?php
    //...

    if ($data == "123")
       echo "data is equal 123";

Check out the manual for strpos() for more information. For a case-insensitive search, you can use stripos() (i for "insensitive") instead.

Checking for strict equality with false is important. If the match begins at the first character in the string, it will return 0, which indicates a match. You need !== to distinguish 0 from false.

Upvotes: 2

aldrin27
aldrin27

Reputation: 3407

Try this one:

<?php
$data = $_POST["data"];

if (strcmp("123",$data) === 0)
   echo "string matches";
else if (strcmp("234",$data))
   echo "string 2 matches";
else 
   echo"string does not match";
?>

Upvotes: 0

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