PHP SplObjectStorage removeAllExcept() Function Last Updated : 23 Jun, 2023 Comments Improve Suggest changes Like Article Like Report The SplObjectStorage::removeAllExcept() function is an inbuilt function in PHP which is used to remove all objects from storage except for those contains by another storage. Syntax: int SplObjectStorage::removeAllExcept() Parameters: This function accepts a single parameter $obj which specify object storage to be retain. Return Value: This function does not return any value. Below programs illustrate the SplObjectStorage::removeAllExcept() function in PHP: Program 1: php <?php $obj1 = new StdClass; $obj2 = new StdClass; $obj3 = new StdClass; $gfg1 = new SplObjectStorage(); $gfg1[$obj1] = "Geeks"; $gfg2 = new SplObjectStorage(); $gfg2[$obj1] = "GFG"; $gfg2[$obj2] = "GeeksClasses"; $gfg2[$obj3] = "SUDO"; // Count all existing objects var_dump(count($gfg2)); // Remove all objects of $gfg2 from $gfg2 $gfg2->removeAllExcept($gfg1); // Print result after removeAll var_dump(count($gfg2)); ?> Output: int(3) int(1) Program 2: php <?php $obj1 = new StdClass; $obj2 = new StdClass; $gfg1 = new SplObjectStorage(); $gfg1[$obj1] = "Geeks"; $gfg2 = new SplObjectStorage(); $gfg2[$obj1] = "GFG"; $gfg2[$obj2] = "GeeksClasses"; // Count and print all existing objects var_dump(count($gfg2)); // Remove all objects of $gfg1 from $gfg2 $gfg2->removeAllExcept($gfg1); // Print result var_dump(count($gfg2)); // Result remains same $gfg2->removeAllExcept($gfg2); // Print result var_dump(count($gfg2)); ?> Output: int(2) int(1) int(1) Reference: https://www.php.net/manual/en/splobjectstorage.removeallexcept.php Comment More infoAdvertise with us Next Article PHP Syntax R R_Raj Follow Improve Article Tags : Web Technologies PHP PHP-function Similar Reads PHP Tutorial PHP is a popular, open-source scripting language mainly used in web development. 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