* For the 'isset', 'null coalescing' and 'error suppression' methods the total time includes time of array_flip call to prepare data. Results with OPcache enabled Array size: 100, 3 passes of 100,000 iterations Method Results with OPcache disabled Array size: 100, 3 passes of 100,000 iterations MethodĪrray size: 1000, 3 passes of 100,000 iterations MethodĪrray size: 10000, 3 passes of 100,000 iterations Method array value by key with the at sign error suppression operator ( array value by key with the (?) null coalescing operator ( $arr ? 0).

Here is a list of all array searching methods we'll compare (if there is something not on the list, write in comment): We disable OPcache for the testing script by adding its path into the OPcache blacklist. In order to check how the performance is affected by OPCache, we run our testing script twice: with OPcache disabled and with OPCache enabled. To make our results more independent on current server load, we'll perform 3 passes for 100,000 iterations for every search method. We will perform our tests on three input arrays of different sizes (100, 1000 and 10,000 elements) to see if performance of these methods degrade with increasing number of elements. We will look for a presence of a specific search string in a simple one-dimensional non-associative array of strings. Array size: 10000, 3 passes of 100,000 iterations.Array size: 1000, 3 passes of 100,000 iterations.Array size: 100, 3 passes of 100,000 iterations.

Foreach php optmize