PHP 8 reference · String Functions

PHP str_starts_with() Function

Check whether a string begins with a given substring. Case-sensitive and returns true or false; added in PHP 8.0.

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Syntax

str_starts_with(string $haystack, string $needle): bool

Parameter	Description
`haystack`	The string to check.
`needle`	The prefix to look for.

true or false.

Check a prefixTry it yourself

<?php
$url = "https://readycamel.com";
var_dump(str_starts_with($url, "https://"));
var_dump(str_starts_with($url, "http://"));

Output

bool(true)
bool(false)

Filter linesTry it yourself

<?php
foreach (["# Title", "Some text", "# Another"] as $line) {
    if (str_starts_with($line, "# ")) {
        echo substr($line, 2), "\n";
    }
}

Output

Title
Another

Version	Change
PHP 8.0	Added

str_ends_with() · Check whether a string ends with a given substring, such as a file extension. Case-sensitive; added in PHP 8.0.
str_contains() · Check whether a string contains a substring and return true or false. Case-sensitive; added in PHP 8.0.
substr() · Return part of a string, given a start position and an optional length. Negative values count from the end.
PHP Strings · tutorial