phpCopy<?php

  $string = "Mr. Peter";

  if(strpos( $string, "Mr." ) === 0){

      echo "The string starts with the desired substring.";

  }else 

      echo "The string does not start with the desired substring.";

?>

​

//php check if first characters of $str = "test"

$str = "test demo";

str_starts_with($str, "test");

<?php

if (str_starts_with('abc', '')) {

    echo "All strings start with the empty string";

}

?>

//php check if first four characters of a string = http

substr( $http, 0, 4 ) === "http";

//php check if first five characters of a string = https

substr( $https, 0, 5 ) === "https";

​

function stringStartsWith($haystack,$needle,$case=true) {

    if ($case){

        return strpos($haystack, $needle, 0) === 0;

    }

    return stripos($haystack, $needle, 0) === 0;

}

​

function stringEndsWith($haystack,$needle,$case=true) {

    $expectedPosition = strlen($haystack) - strlen($needle);

    if ($case){

        return strrpos($haystack, $needle, 0) === $expectedPosition;

    }

    return strripos($haystack, $needle, 0) === $expectedPosition;

}

echo stringStartsWith("Hello World","Hell"); // true

echo stringEndsWith("Hello World","World"); // true

phpCopy<?php

  $string = "Mr. Peter";

  if(strncmp($string, "Mr.", 3) === 0){

      echo "The string starts with the desired substring.";

  }else 

      echo "The string does not start with the desired substring.";

?>

​

substr( $string_n, 0, 4 ) === "http"

​

phpCopy<?php

  $string = "Mr. Peter";

  if(substr($string, 0, 3) === "Mr."){

      echo "The string starts with the desired substring.";

  }else 

      echo "The string does not start with the desired substring.";

?>

​

phpCopy<?php

  $string = "mr. Peter";

  if(strncasecmp($string, "Mr.", 3) === 0){

      echo "The string starts with the desired substring.";

  }else 

      echo "The string does not start with the desired substring.";

?>

​

substr($string, 0, strlen($query)) === $query

​