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<?php |
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/** |
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* Variable Arithmetic tests. |
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* |
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* @package PHPCheatsheets |
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*/ |
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// Prevent direct calls to this file. |
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if ( ! defined( 'APP_DIR' ) ) { |
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header( 'Status: 403 Forbidden' ); |
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header( 'HTTP/1.1 403 Forbidden' ); |
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exit(); |
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} |
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require_once APP_DIR . '/class.vartype-compare.php'; |
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/** |
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* Variable Arithmetic tests. |
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*/ |
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class VartypeArithmetic extends VartypeCompare { |
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/** |
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* The tests to run. |
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* |
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* @var array $tests Multi-dimensional array. |
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* Possible lower level array keys: |
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* - title Used as tab title |
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* - tooltip Additional code sample for tooltip on tab |
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* - url Relevant PHP Manual page |
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* - arg Function arguments |
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* - function Function to run |
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* - Notes Array of notes on this test |
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*/ |
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var $tests = array( |
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/** |
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* Operator based calculations. |
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*/ |
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'negate' => array( |
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'title' => 'negate…', |
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'tooltip' => '$a == -$b', |
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'url' => 'https://php.net/language.operators.arithmetic', |
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'arg' => '$a, $b', |
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'function' => 'if ( ( ! is_array( $a ) && ! is_array( $b ) ) && ( ! is_object( $a ) && ! is_object( $b ) ) ) { pr_bool( $a == -$b ); } else if ( PHP_VERSION_ID >= 50006 && ( ! is_array( $a ) && ! is_array( $b ) ) && ( is_object( $a ) || is_object( $b ) ) ) { pr_bool( $a == -$b ); } else { trigger_error( \'Unsupported operand types\', E_USER_ERROR ); }', |
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), |
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'negate_strict' => array( |
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'title' => 'negate strict…', |
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'tooltip' => '$a === -$b', |
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'url' => 'https://php.net/language.operators.arithmetic', |
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'arg' => '$a, $b', |
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'function' => 'if ( ( ! is_array( $a ) && ! is_array( $b ) ) && ( ! is_object( $a ) && ! is_object( $b ) ) ) { pr_bool( $a === -$b ); } else if ( PHP_VERSION_ID >= 50006 && ( ! is_array( $a ) && ! is_array( $b ) ) && ( is_object( $a ) || is_object( $b ) ) ) { pr_bool( $a === -$b ); } else { trigger_error( \'Unsupported operand types\', E_USER_ERROR ); }', |
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), |
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'sum' => array( |
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'title' => '+', |
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'tooltip' => '$a + $b', |
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'url' => 'https://php.net/language.operators.arithmetic', |
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'arg' => '$a, $b', |
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'function' => 'if ( ( ( ! is_array( $a ) && ! is_array( $b ) || ( is_array( $a ) && is_array( $b ) ) ) ) && ( ! is_object( $a ) && ! is_object( $b ) ) ) { pr_var( $a + $b, \'\', true, true ); } else if ( PHP_VERSION_ID >= 50006 && ( ! is_array( $a ) && ! is_array( $b ) ) && ( is_object( $a ) || is_object( $b ) ) ) { pr_var( $a + $b, \'\', true, true ); } else { trigger_error( \'Unsupported operand types\', E_USER_ERROR ); }', |
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'notes' => array( |
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'<p>Take note of the fact that <code> + </code> is a valid <a href="https://php.net/language.operators.array" target="_blank">array operator</a>.</p>', |
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), |
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), |
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'subtract' => array( |
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'title' => '-', |
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'tooltip' => '$a - $b', |
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'url' => 'https://php.net/language.operators.arithmetic', |
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'arg' => '$a, $b', |
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'function' => 'if ( ( ! is_array( $a ) && ! is_array( $b ) ) && ( ! is_object( $a ) && ! is_object( $b ) ) ) { pr_var( $a - $b, \'\', true, true ); } else if ( PHP_VERSION_ID >= 50006 && ( ! is_array( $a ) && ! is_array( $b ) ) && ( is_object( $a ) || is_object( $b ) ) ) { pr_var( $a - $b, \'\', true, true ); } else { trigger_error( \'Unsupported operand types\', E_USER_ERROR ); }', |
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), |
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'multiply' => array( |
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'title' => '*', |
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'tooltip' => '$a * $b', |
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'url' => 'https://php.net/language.operators.arithmetic', |
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'arg' => '$a, $b', |
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'function' => 'if ( ( ! is_array( $a ) && ! is_array( $b ) ) && ( ! is_object( $a ) && ! is_object( $b ) ) ) { pr_var( $a * $b, \'\', true, true ); } else if ( PHP_VERSION_ID >= 50006 && ( ! is_array( $a ) && ! is_array( $b ) ) && ( is_object( $a ) || is_object( $b ) ) ) { pr_var( $a * $b, \'\', true, true ); } else { trigger_error( \'Unsupported operand types\', E_USER_ERROR ); }', |
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), |
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'divide' => array( |
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'title' => '/', |
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'tooltip' => '$a / $b', |
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'url' => 'https://php.net/language.operators.arithmetic', |
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'arg' => '$a, $b', |
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'function' => 'if ( ( ! is_array( $a ) && ! is_array( $b ) ) && ( ! is_object( $a ) && ! is_object( $b ) ) ) { $r = $a / $b; if ( is_bool( $r ) ) { pr_bool( $r ); } else { pr_var( $r, \'\', true, true ); } } else if ( PHP_VERSION_ID >= 50006 && ( ! is_array( $a ) && ! is_array( $b ) ) && ( is_object( $a ) || is_object( $b ) ) ) { $r = $a / $b; if ( is_bool( $r ) ) { pr_bool( $r ); } else { pr_var( $r, \'\', true, true ); } } else { trigger_error( \'Unsupported operand types\', E_USER_ERROR ); }', |
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), |
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'modulus' => array( |
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'title' => '%', |
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'tooltip' => '$a % $b', |
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'url' => 'https://php.net/language.operators.arithmetic', |
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'arg' => '$a, $b', |
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'function' => '$r = $a % $b; if ( is_bool( $r ) ) { pr_bool( $r ); } else { pr_var( $r, \'\', true, true ); }', |
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'notes' => array( |
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'<p>Pre-PHP 7, a "<em>Division by zero</em>" error would be emitted as a warning. From PHP 7 onwards, this has been changed to a catchable fatal error.</p>', |
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), |
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), |
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// Will be removed from $tests property from constructor if not on PHP 5.6+ to prevent parse errors. |
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'pow_operator' => array( |
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'title' => '**', |
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'url' => 'https://php.net/language.operators.arithmetic', |
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'arg' => '$a, $b', |
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'function' => 'if ( PHP_VERSION_ID >= 50600 ) { pr_var( $a ** $b, \'\', true, true ); } else { print \'E: \'**\' operator not available (PHP 5.6+)\'; }', |
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'notes' => array( |
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'<p>This operator is only available in PHP 5.6.0+.</p>', |
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), |
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), |
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// Doesn't really belong in arithmetic, but for now it's the most logical place anyhow. |
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'concatenate' => array( |
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'title' => '.', |
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'tooltip' => '$a . $b', |
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'url' => 'https://php.net/language.operators.string.php', |
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'arg' => '$a, $b', |
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'function' => 'pr_var( $a . $b, \'\', true, true );', |
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), |
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'fmod' => array( |
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'title' => 'fmod()', |
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'url' => 'https://php.net/fmod', |
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'arg' => '$a, $b', |
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'function' => 'if ( function_exists( \'fmod\' ) ) { pr_var( fmod( $a, $b ), \'\', true, true ); } else { print \'E: not available (PHP 4.2.0+)\'; }', |
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), |
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'pow' => array( |
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'title' => 'pow()', |
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'url' => 'https://php.net/pow', |
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'arg' => '$a, $b', |
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'function' => 'pr_var( pow( $a, $b ), \'\', true, true );', |
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), |
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'intdiv' => array( |
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'title' => 'intdiv()', |
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'url' => 'https://php.net/intdiv', |
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'arg' => '$a, $b', |
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'function' => 'if ( function_exists( \'intdiv\' ) ) { pr_var( intdiv( $a, $b ), \'\', true, true ); } else { print \'E: not available (PHP 7.0.0+)\'; }', |
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'notes' => array( |
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'<p>The <em>intdiv()</em> function is only available in PHP 7.0.0+.</p>', |
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), |
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), |
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); |
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/** |
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* Calculations with BCMath. |
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* |
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* Will be added to $tests property from constructor if BCMath is available. |
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* |
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* @var array $bcmath_tests Multi-dimensional array of BC Math related tests. |
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*/ |
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var $bcmath_tests = array( |
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'bcadd' => array( |
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'title' => 'bcadd()', |
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'url' => 'https://php.net/bcadd', |
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'arg' => '$a, $b', |
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'function' => '$r = bcadd( $a, $b ); if ( is_string( $r ) ) { pr_str( $r ); } else { pr_var ( $r, \'\', true, true ); }', |
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'notes' => array( |
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'<p>For this cheat sheet <code>bcscale()</code> has been set to 3. Remember that the default is 0.</p>', |
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'<p>For a reliable implementation of all the BCMath functions which avoids a number of the common pitfalls, see <a href="https://gist.github.com/jrfnl/8449978" target="_blank">this example function</a> (gist).</p>', |
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), |
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), |
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'bcsub' => array( |
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'title' => 'bcsub()', |
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'url' => 'https://php.net/bcsub', |
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'arg' => '$a, $b', |
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'function' => '$r = bcsub( $a, $b ); if ( is_string( $r ) ) { pr_str( $r ); } else { pr_var ( $r, \'\', true, true ); }', |
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'notes' => array( |
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'<p>For this cheat sheet <code>bcscale()</code> has been set to 3. Remember that the default is 0.</p>', |
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'<p>For a reliable implementation of all the BCMath functions which avoids a number of the common pitfalls, see <a href="https://gist.github.com/jrfnl/8449978" target="_blank">this example function</a> (gist).</p>', |
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), |
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), |
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'bcmul' => array( |
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'title' => 'bcmul()', |
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'url' => 'https://php.net/bcmul', |
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'arg' => '$a, $b', |
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'function' => '$r = bcmul( $a, $b ); if ( is_string( $r ) ) { pr_str( $r ); } else { pr_var ( $r, \'\', true, true ); }', |
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'notes' => array( |
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'<p>For this cheat sheet <code>bcscale()</code> has been set to 3. Remember that the default is 0.</p>', |
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'<p>For a reliable implementation of all the BCMath functions which avoids a number of the common pitfalls, see <a href="https://gist.github.com/jrfnl/8449978" target="_blank">this example function</a> (gist).</p>', |
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), |
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), |
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'bcdiv' => array( |
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'title' => 'bcdiv()', |
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'url' => 'https://php.net/bcdiv', |
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'arg' => '$a, $b', |
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'function' => '$r = bcdiv( $a, $b ); if ( is_string( $r ) ) { pr_str( $r ); } else { pr_var ( $r, \'\', true, true ); }', |
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'notes' => array( |
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'<p>For this cheat sheet <code>bcscale()</code> has been set to 3. Remember that the default is 0.</p>', |
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'<p>For a reliable implementation of all the BCMath functions which avoids a number of the common pitfalls, see <a href="https://gist.github.com/jrfnl/8449978" target="_blank">this example function</a> (gist).</p>', |
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), |
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), |
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'bcmod' => array( |
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'title' => 'bcmod()', |
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'url' => 'https://php.net/bcmod', |
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'arg' => '$a, $b', |
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'function' => '$r = bcmod( $a, $b ); if ( is_string( $r ) ) { pr_str( $r ); } else { pr_var ( $r, \'\', true, true ); }', |
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'notes' => array( |
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'<p>For this cheat sheet <code>bcscale()</code> has been set to 3. Remember that the default is 0.</p>', |
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'<p>For a reliable implementation of all the BCMath functions which avoids a number of the common pitfalls, see <a href="https://gist.github.com/jrfnl/8449978" target="_blank">this example function</a> (gist).</p>', |
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), |
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), |
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203
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/* |
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204
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Issue #5: https://github.com/jrfnl/PHP-cheat-sheet-extended/issues/5 |
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205
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206
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'bcpow' => array( |
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'title' => 'bcpow()', |
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'url' => 'https://php.net/bcpow', |
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'arg' => '$a, $b', |
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'function' => 'if ( $a != 0 && is_infinite( pow( $a, $b ) ) === false ) { $r = bcpow( $a, $b ); if ( is_string( $r ) ) { pr_str( $r ); } else { pr_var ( $r, \'\', true, true ); } } else { trigger_error( \'would result in INF and will normally exhaust memory\', E_USER_ERROR ); }', |
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'notes' => array( |
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212
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'<p>For this cheat sheet <code>bcscale()</code> has been set to 3. Remember that the default is 0.</p>', |
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213
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'<p>For a reliable implementation of all the BCMath functions which avoids a number of the common pitfalls, see <a href="https://gist.github.com/jrfnl/8449978" target="_blank">this example function</a> (gist).</p>', |
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), |
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), |
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*/ |
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); |
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219
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220
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/** |
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* Constructor. |
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*/ |
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function __construct() { |
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if ( PHP_VERSION_ID < 50600 ) { |
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unset( $this->tests['pow_operator'] ); |
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} |
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if ( PHP_VERSION_ID < 70000 ) { |
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unset( $this->tests['intdiv'] ); |
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} |
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230
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if ( extension_loaded( 'bcmath' ) ) { |
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$this->tests = array_merge( $this->tests, $this->bcmath_tests ); |
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bcscale( 3 ); |
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233
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} |
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parent::__construct(); |
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} |
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237
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238
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/** |
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239
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* PHP4 Constructor. |
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240
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*/ |
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241
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function VartypeArithmetic() { |
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242
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$this->__construct(); |
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243
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} |
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244
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} |
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245
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jrfnl /
PHP-cheat-sheet-extended
