array-walk | 易学教程

using array_walk_recursive() for stdClass objects

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问题 I have looked through a few answers on here but that don't seem to utilise this method? I have an array of items, and the items are objects. The object can have a key which is 'children' and 'children' is an array of objects etc. Is there a way to achieve this? Example: Array ( [1] => stdClass Object ( [id] => 1 [name] => Steve King [image] => upload/shop/fe7a66254e4249af2b0093efca75a914.jpg [parent] => 0 [children] => Array ( ) ) [2] => stdClass Object ( [id] => 2 [name] => Eden Hall [image]

using array_walk_recursive() for stdClass objects

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PHP 5.4 Call-time pass-by-reference - How to fix it?

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问题 I have the problem that I get the error PHP Fatal error: Call-time pass-by-reference has been removed in.... I discovered some similar questions e.g. PHP 5.4 Call-time pass-by-reference - Easy fix available? Call-time pass-by-reference warning But nothing offers a reals answers how situations be can solved where you NEED to declare the passed value as refference by runtime for e.g. buildin function which you cant change function declaration ??. e.g. for this example third array_walk parameter

PHP sum up array entries where two keys have the same value

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问题 I have the following array, in which I want to sum up the total_volume for all entries where the source and the target are the same. Array ( [0] => Array ( [source] => ABC [target] => DEF [total_volume] => 10 ) [1] => Array ( [source] => ABC [target] => GHI [total_volume] => 5 ) [2] => Array ( [source] => ABC [target] => DEF [total_volume] => 5 ) ) The resulting array should look like this: ResultArray ( [0] => Array ( [source] => ABC [target] => DEF [total_volume] => 15 ) [1] => Array (

How do I use a class method as a callback function?

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If I use array_walk inside a class function to call another function of the same class class user { public function getUserFields($userIdsArray,$fieldsArray) { if((isNonEmptyArray($userIdsArray)) && (isNonEmptyArray($fieldsArray))) { array_walk($fieldsArray, 'test_print'); } } private function test_print($item, $key) { //replace the $item if it matches something } } It gives me the following error - Warning: array_walk() [function.array-walk]: Unable to call test_print() - function does not exist in ... So, how do I specify $this->test_print() while using array_walk() ? Daniel Vandersluis If

How do I use a class method as a callback function?

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问题 If I use array_walk inside a class function to call another function of the same class class user { public function getUserFields($userIdsArray,$fieldsArray) { if((isNonEmptyArray($userIdsArray)) && (isNonEmptyArray($fieldsArray))) { array_walk($fieldsArray, 'test_print'); } } private function test_print($item, $key) { //replace the $item if it matches something } } It gives me the following error - Warning: array_walk() [function.array-walk]: Unable to call test_print() - function does not