//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";
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.";
?>
//php check if first characters of $str = "test"
$str = "test demo";
str_starts_with($str, "test");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) === $expectedPosition;
}
echo stringStartsWith("Hello World","Hell"); // true
echo stringEndsWith("Hello World","World"); // truefunction startsWith($haystack, $needle)
{
$length = strlen($needle);
return (substr($haystack, 0, $length) === $needle);
}
function endsWith($haystack, $needle)
{
$length = strlen($needle);
if ($length == 0) {
return true;
}
return (substr($haystack, -$length) === $needle);
}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.";
?>