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class.vartype-php5.php
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class.vartype-php5.php
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<?php
/**
* PHP 5+ tests.
*
* @package PHPCheatsheets
*
* Select PHPCS exclusions: this file is only included when on PHP 5+.
* @phpcs:disable PHPCompatibility.Classes.NewClasses.exceptionFound
*
* Select PHPCS exclusions: the calls to these functions are wrapped in a function_exists() check.
* @phpcs:disable PHPCompatibility.FunctionUse.NewFunctions.filter_varFound
* @phpcs:disable PHPCompatibility.FunctionUse.NewFunctions.filter_var_arrayFound
*/
// Prevent direct calls to this file.
if ( ! defined( 'APP_DIR' ) ) {
header( 'Status: 403 Forbidden' );
header( 'HTTP/1.1 403 Forbidden' );
exit();
}
/**
* Overload some tests when using PHP5.
*
* These tests are added in the relevant child class of the Vartype class.
*/
class VartypePHP5 {
/**
* The PHP5 specific tests which will overrule the PHP4 compatible tests.
*
* @var array $tests Multi-dimensional array.
*/
public static $tests = array(
/*
* String comparison functions.
*
* @see class.vartype-compare.php
*/
'strcmp' => array(
'function' => 'VartypePHP5::compare_strings( $a, $b, "strcmp" );',
),
'strcasecmp' => array(
'function' => 'VartypePHP5::compare_strings( $a, $b, "strcasecmp" );',
),
'strnatcmp' => array(
'function' => 'VartypePHP5::compare_strings( $a, $b, "strnatcmp" );',
),
'strnatcasecmp' => array(
'function' => 'VartypePHP5::compare_strings( $a, $b, "strnatcasecmp" );',
),
'strcoll' => array(
'function' => 'VartypePHP5::compare_strings( $a, $b, "strcoll" );',
),
'similar_text' => array(
'function' => 'VartypePHP5::compare_strings( $a, $b, "similar_text" );',
),
'levenshtein' => array(
'function' => 'VartypePHP5::compare_strings( $a, $b, "levenshtein" );',
),
/*
* Loose type juggling.
*
* @see class.vartype-test.php
*/
'juggle_int' => array(
'function' => '
try {
if ( ! is_array( $x ) && ( PHP_VERSION_ID > 50005 || ! is_object( $x ) ) ) {
$x = $x + 0;
if ( is_int( $x ) ) {
pr_int( $x );
}
else if ( is_float( $x ) ) {
pr_flt( $x );
}
else {
pr_var( $x, \'\', true, true );
}
}
else {
trigger_error( \'Unsupported operand types\', E_USER_ERROR );
}
}
catch ( Exception $e ) {
$message = $e->getMessage();
$key = array_search( $message, $GLOBALS[\'encountered_errors\'] );
if ( $key === false ) {
$GLOBALS[\'encountered_errors\'][] = $message;
$key = array_search( $message, $GLOBALS[\'encountered_errors\'] );
}
echo \'<span class="error">Fatal error <a href="#\', $GLOBALS[\'test\'], \'-errors">#\', ( $key + 1 ), \'</a></span>\';
}
',
),
'juggle_flt' => array(
'function' => '
try {
if ( ! is_array( $x ) && ( PHP_VERSION_ID > 50005 || ! is_object( $x ) ) ) {
$r = $x + 0.0;
if ( is_float( $r ) ) {
pr_flt( $r );
}
else if ( is_int( $r ) ) {
pr_int( $r );
}
else {
pr_var( $r, \'\', true, true );
}
}
else {
trigger_error( \'Unsupported operand types\', E_USER_ERROR );
}
}
catch ( Exception $e ) {
$message = $e->getMessage();
$key = array_search( $message, $GLOBALS[\'encountered_errors\'] );
if ( $key === false ) {
$GLOBALS[\'encountered_errors\'][] = $message;
$key = array_search( $message, $GLOBALS[\'encountered_errors\'] );
}
echo \'<span class="error">Fatal error <a href="#\', $GLOBALS[\'test\'], \'-errors">#\', ( $key + 1 ), \'</a></span>\';
}
',
),
/*
* Some object related functions.
*
* @see class.vartype-test.php
*/
'instanceof' => array(
'function' => '$c = \'TestObject\'; $r = ( $x instanceof $c ); if ( is_bool( $r ) ) { pr_bool( $r ); } else { pr_var( $r, \'\', true, true ); }',
),
);
/**
* Helper method to retrieve the static variable.
* Needed to prevent parse error in PHP4.. *sigh*.
*
* @return array
*/
public static function get_tests() {
return self::$tests;
}
/**
* Ensure we clone an object before using it to avoid contamination by results of previous actions.
*
* @param mixed $value
*
* @return mixed
*/
public static function generate_value( $value ) {
if ( is_object( $value ) ) {
$value = clone $value;
}
if ( is_array( $value ) || is_object( $value ) ) {
reset( $value );
}
return $value;
}
/**
* Smarter way to compare strings in PHP5.
*
* @param mixed $var1
* @param mixed $var2
* @param string $function
*/
public static function compare_strings( $var1, $var2, $function ) {
if ( ( PHP_VERSION_ID >= 50000 && $function === 'levenshtein' ) && ( ( gettype( $var1 ) === 'array' || gettype( $var1 ) === 'resource' ) || ( gettype( $var2 ) === 'array' || gettype( $var2 ) === 'resource' ) ) ) {
try {
pc_compare_strings( $var1, $var2, $function );
}
catch ( Exception $e ) {
self::handle_exception( $e->getMessage() );
}
}
else if ( PHP_VERSION_ID >= 50200 && ( gettype( $var1 ) === 'object' || gettype( $var2 ) === 'object' ) ) {
try {
pc_compare_strings( $var1, $var2, $function );
}
catch ( Exception $e ) {
self::handle_exception( $e->getMessage() );
}
}
else {
pc_compare_strings( $var1, $var2, $function );
}
}
/**
* Helper function to handle exceptions from the string compare function.
*
* @param string $message The error message.
*/
public static function handle_exception( $message ) {
$key = get_error_key( $message );
echo '<span class="error">(Catchable) Fatal error <a href="#', $GLOBALS['test'], '-errors">#', ( $key + 1 ), '</a></span>';
}
/**
* Run tests using the filter extension.
*
* @param mixed $value Value to test.
* @param string|null $expected Expected variable type of the output of the test.
* @param int $filter The Filter to apply.
* @param mixed|null $flags Which filter flags to apply.
* @param mixed|null $options Which options to apply.
*/
public static function filter_combined( $value, $expected = null, $filter = FILTER_DEFAULT, $flags = null, $options = null ) {
if ( function_exists( 'filter_var' ) && function_exists( 'filter_var_array' ) ) {
if ( ! is_array( $value ) ) {
self::do_filter_var( $value, $expected, $filter, $flags, $options );
}
else {
self::do_filter_var_array( $value, $filter, $flags, $options );
}
}
else {
echo 'E: not available (PHP 5.2.0+)';
}
}
/**
* Helper function: Run tests using the `filter_var()` function.
*
* @param mixed $value Value to test.
* @param string|null $expected Expected variable type of the output of the test.
* @param int $filter The Filter to apply.
* @param mixed|null $flags Which filter flags to apply.
* @param mixed|null $options Which options to apply.
*/
public static function do_filter_var( $value, $expected = null, $filter = FILTER_DEFAULT, $flags = null, $options = null ) {
$opt = array();
if ( isset( $flags ) ) {
$opt['flags'] = $flags;
}
if ( isset( $options ) && ( is_array( $options ) && $options !== array() ) ) {
$opt['options'] = $options;
}
if ( $opt !== array() ) {
$result = filter_var( $value, $filter, $opt );
}
else {
$result = filter_var( $value, $filter );
}
self::print_typed_result( $result, $expected );
}
/**
* Helper function: Run tests using the `filter_var_array()` function.
*
* @param mixed $value Value to test.
* @param int $filter The Filter to apply.
* @param mixed|null $flags Which filter flags to apply.
* @param mixed|null $options Which options to apply.
*/
public static function do_filter_var_array( $value, $filter = FILTER_DEFAULT, $flags = null, $options = null ) {
if ( ! isset( $flags ) && ! isset( $options ) ) {
pr_var( filter_var_array( $value, $filter ), '', true, true );
}
else {
$input = array(
'x' => $value,
);
$filter_def = array(
'x' => array(
'filter' => $filter,
),
);
if ( isset( $flags ) ) {
$filter_def['x']['flags'] = ( FILTER_REQUIRE_ARRAY | $flags );
}
if ( isset( $options ) && ( is_array( $options ) && $options !== array() ) ) {
$filter_def['x']['options'] = $options;
}
$output = filter_var_array( $input, $filter_def );
pr_var( $output['x'], '', true, true );
}
}
/**
* Helper function to print the filter result.
*
* @param mixed $result
* @param string|null $expected Expected variable type of the output of the test.
*/
public static function print_typed_result( $result, $expected = null ) {
switch ( true ) {
case ( $expected === 'bool' && is_bool( $result ) === true ):
pr_bool( $result );
break;
case ( $expected === 'int' && is_int( $result ) === true ):
pr_int( $result );
break;
case ( $expected === 'float' && is_float( $result ) === true ):
pr_flt( $result );
break;
case ( $expected === 'string' && is_string( $result ) === true ):
pr_str( $result );
break;
default:
pr_var( $result, '', true, true );
break;
}
}
}