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All numerical array keys will be modified to start counting from zero while literal keys won't be changed. The new array Tip: You can add one value, or as many as you like. All numerical array keys will be modified to start counting from zero while literal keys won't be changed. Prepend one or more elements to the beginning of an array Last version of PHP deprecated unshifting of a reference. Definition and Usage The array_unshift () function inserts new elements to an array. The array_unshift() function inserts new elements to an array. array_unshift() ajoute les éléments value1, ..., passés en argument au début du tableau array.Notez que les éléments sont ajoutés comme un tout, et qu'ils restent dans le même ordre. Beachten Sie, dass die Liste von Elementen als Ganzes eingefügt wird, sodass die eingefügten Elemente die selbe Reihenfolge haben. Examples might be simplified to improve reading and basic understanding.

Die numerischen Schlüssel werden so modifiziert, dass bei 0 zu zählen begonnen wird, Strings als Schlüssel bleiben unverändert. Another way to tack something to the beginning of an array is with array_merge().

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The new array values will be inserted in the beginning of the array. Note that the list of elements is prepended as a whole, so that the prepended elements stay in the same order. Try it like this if you need to prepend something to the array without the keys being reindexed and/or need to prepend a key value pair, you can use this short function: If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: array_merge() will also reindex (see array_merge() manual entry), but the '+' operator won't, so... Sahn's example almost works but has a small error. PHP | array_unshift () Function Last Updated: 14-06-2019 This inbuilt function of PHP is used to add on or more elements into an array and these elements are added to at the beginning of the array. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. Actually this problem with the keys getting reindexed only happens when the keys are numerical: For example:

// before last PHP (now generates a deprecation warning) // since last PHP (caution, there is a wrapping array !!) W3Schools is optimized for learning, testing, and training. Note: The list of elements is prepended as a whole so that the prepended elements stay in the same order. If you need to prepend something to the array without the keys being reindexed and/or need to prepend a key value pair, you can use this short function: array_unshift () prepends passed elements to the front of the array. All the elements that we add into the array are inserted … array_unshift() fügt die übergebenen Elemente am Anfang von array ein. You can preserve keys and unshift an array with numerical indexes in a really simple way if you'll do the following: values will be inserted in the beginning of the array. I had a need tonight to convert a numeric array from 1-based to 0-based, and found that the following worked just fine due to the "side effect" of renumbering: Toutes les clés numériques seront modifiées afin de commencer à partir de … This becomes a nice little problem if you index your arrays out of order (while manually sorting). The array_unshift () is used to add one or more elements to the beginning of an array. Anonymous' associative version wasn't working for me, but it did with this small tweak:

If you need to change the name of a key without changing its position in the array this function may be useful.