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<?php $test = array("", NULL, 0, 1, "0", "1", true, false, new stdClass(), array(1), array()); foreach($test as $t) { echo var_export($t, true) . "\t !!(x)=\t" . var_export((!!$t), true) . "\t (x==true)=\t" . var_export(($t==true),true). "\t (x===true)=\t" . var_export(($t===true),true). "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
'' !!(x)= false (x==true)= false (x===true)= false NULL !!(x)= false (x==true)= false (x===true)= false 0 !!(x)= false (x==true)= false (x===true)= false 1 !!(x)= true (x==true)= true (x===true)= false '0' !!(x)= false (x==true)= false (x===true)= false '1' !!(x)= true (x==true)= true (x===true)= false true !!(x)= true (x==true)= true (x===true)= true false !!(x)= false (x==true)= false (x===true)= false (object) array( ) !!(x)= true (x==true)= true (x===true)= false array ( 0 => 1, ) !!(x)= true (x==true)= true (x===true)= false array ( ) !!(x)= false (x==true)= false (x===true)= false

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