php string starts with

1//php check if first four characters of a string = http
2substr( $http, 0, 4 ) === "http";
3//php check if first five characters of a string = https
4substr( $https, 0, 5 ) === "https";
5

1function stringStartsWith($haystack,$needle,$case=true) {
2    if ($case){
3        return strpos($haystack, $needle, 0) === 0;
4    }
5    return stripos($haystack, $needle, 0) === 0;
6}
7
8function stringEndsWith($haystack,$needle,$case=true) {
9    $expectedPosition = strlen($haystack) - strlen($needle);
10    if ($case){
11        return strrpos($haystack, $needle, 0) === $expectedPosition;
12    }
13    return strripos($haystack, $needle, 0) === $expectedPosition;
14}
15echo stringStartsWith("Hello World","Hell"); // true
16echo stringEndsWith("Hello World","World"); // true

1phpCopy<?php
2  $string = "Mr. Peter";
3  if(strncmp($string, "Mr.", 3) === 0){
4      echo "The string starts with the desired substring.";
5  }else 
6      echo "The string does not start with the desired substring.";
7?>
8

1function startsWith($haystack, $needle)
2{
3     $length = strlen($needle);
4     return (substr($haystack, 0, $length) === $needle);
5}
6
7function endsWith($haystack, $needle)
8{
9    $length = strlen($needle);
10    if ($length == 0) {
11        return true;
12    }
13
14    return (substr($haystack, -$length) === $needle);
15}

1phpCopy<?php
2  $string = "Mr. Peter";
3  if(substr($string, 0, 3) === "Mr."){
4      echo "The string starts with the desired substring.";
5  }else 
6      echo "The string does not start with the desired substring.";
7?>
8

1phpCopy<?php
2  $string = "Mr. Peter";
3  if(strpos( $string, "Mr." ) === 0){
4      echo "The string starts with the desired substring.";
5  }else 
6      echo "The string does not start with the desired substring.";
7?>
8