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Test dirname() function : usage variation
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Dave Kelsey <d_kelsey@uk.ibm.com>
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/* Prototype : string dirname(string path)
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* Description: Returns the directory name component of the path
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* Source code: ext/standard/string.c
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echo "*** Testing dirname() : usage variation ***\n";
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// Define error handler
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function test_error_handler($err_no, $err_msg, $filename, $linenum, $vars) {
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if (error_reporting() != 0) {
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// report non-silenced errors
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echo "Error: $err_no - $err_msg, $filename($linenum)\n";
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set_error_handler('test_error_handler');
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// Initialise function arguments not being substituted (if any)
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//get an unset variable
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// define some classes
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class classWithToString
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public function __toString() {
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return "Class A object";
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class classWithoutToString
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$index_array = array (1, 2, 3);
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$assoc_array = array ('one' => 1, 'two' => 2);
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//array of values to iterate over
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'int -12345' => -2345,
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'float -10.5' => -10.5,
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'float 12.3456789000e10' => 12.3456789000e10,
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'float -12.3456789000e10' => -12.3456789000e10,
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'empty array' => array(),
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'int indexed array' => $index_array,
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'associative array' => $assoc_array,
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'nested arrays' => array('foo', $index_array, $assoc_array),
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'uppercase NULL' => NULL,
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'lowercase null' => null,
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'lowercase true' => true,
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'lowercase false' =>false,
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'uppercase TRUE' =>TRUE,
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'uppercase FALSE' =>FALSE,
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'empty string DQ' => "",
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'empty string SQ' => '',
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'instance of classWithToString' => new classWithToString(),
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'instance of classWithoutToString' => new classWithoutToString(),
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'undefined var' => @$undefined_var,
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'unset var' => @$unset_var,
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// loop through each element of the array for path
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foreach($inputs as $key =>$value) {
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var_dump( dirname($value) );
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*** Testing dirname() : usage variation ***
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--float 12.3456789000e10--
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--float -12.3456789000e10--
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Error: 2 - dirname() expects parameter 1 to be string, array given, %s(%d)
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--int indexed array--
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Error: 2 - dirname() expects parameter 1 to be string, array given, %s(%d)
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--associative array--
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Error: 2 - dirname() expects parameter 1 to be string, array given, %s(%d)
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Error: 2 - dirname() expects parameter 1 to be string, array given, %s(%d)
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--instance of classWithToString--
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--instance of classWithoutToString--
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Error: 2 - dirname() expects parameter 1 to be string, object given, %s(%d)