Online PHP editor | rfc for dUbZ9

@ 2023-03-29T15:36:12Z

<?php

if ( ! function_exists( 'str_starts_with' ) ) {
    function str_starts_with( $haystack, $needle ) {
        if ( '' === $needle ) {
            return true;
 	    }
        return 0 === strpos( $haystack, $needle );
    }   
}

$string = 'abcdefghijklmnopqrstuvwxyz';

$start = hrtime(true);

for ( $i = 0; $i < 1000000; $i++ ) {
    $result1 = str_starts_with( $string, 'abc' );
    $result2 = str_starts_with( $string, 'abd' );
}

$end = hrtime(true);

$str_starts_with_time = $end - $start;

$start = hrtime(true);

for ( $i = 0; $i < 1000000; $i++ ) {
    $result1 = 0 === strpos( $string, 'abc' );
    $result2 = 0 === strpos( $string, 'abd' );
}

$end = hrtime(true);

$strpos_time = $end - $start;

echo 'str_starts_with: ' . $str_starts_with_time . PHP_EOL;
echo 'strpos: ' . $strpos_time . PHP_EOL;

// echo which function is faster
if ( $str_starts_with_time < $strpos_time ) {
    echo 'str_starts_with is faster' . PHP_EOL;
} else {
    echo 'strpos is faster' . PHP_EOL;
}

Output for git.master: str_starts_with: 74871561 strpos: 61657967 strpos is faster
Output for git.master_jit: str_starts_with: 73832587 strpos: 71354651 strpos is faster
Output for rfc.property-hooks: str_starts_with: 34524678 strpos: 40422826 str_starts_with is faster

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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