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run code in 300+ PHP versions simultaneously

@ 2015-10-23T05:35:02Z

<?php

$url = '///example.com';

var_dump( wp_parse_url( $url ) );

$url = '://example.com';

var_dump( wp_parse_url( $url ) );

function wp_parse_url( $url ) {
	$parts = @parse_url( $url );
	if ( ! $parts ) {
		// < PHP 5.4.7 compat, trouble with relative paths including a scheme break in the path
		if ( '/' == $url[0] && false !== strpos( $url, '://' ) ) {
			// Since we know it's a relative path, prefix with a scheme/host placeholder and try again
			if ( ! $parts = @parse_url( 'placeholder://placeholder' . $url ) ) {
				return $parts;
			}
			// Remove the placeholder values
			unset( $parts['scheme'], $parts['host'] );
		} else {
			return $parts;
		}
	}
	
	// < PHP 5.4.7 compat, doesn't detect schemeless URL's host field
	if ( '//' == substr( $url, 0, 2 ) && ! isset( $parts['host'] ) ) {
		$path_parts = explode( '/', substr( $parts['path'], 2 ), 2 );
		$parts['host'] = $path_parts[0];
		if ( isset( $path_parts[1] ) ) {
			$parts['path'] = '/' . $path_parts[1];
		} else {
			unset( $parts['path'] );
		}
	}
	
	return $parts;
}

Output for 5.4.7 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: bool(false) array(1) { ["path"]=> string(14) "://example.com" }
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 bool(false) array(1) { ["path"]=> string(14) "://example.com" }
Output for 5.3.6 - 5.3.29, 5.4.0 - 5.4.6: array(2) { ["path"]=> string(12) "/example.com" ["host"]=> string(0) "" } array(1) { ["path"]=> string(14) "://example.com" }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.5: array(2) { ["path"]=> string(12) "/example.com" ["host"]=> string(0) "" } bool(false)

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