Comparison of Methods for deleting the specified values in an array using php

You also have a function. Many built-in functions in the php tutorial have problems (not an error, but the applicability is narrow)

For (old array .....){
If (the value to be deleted)
Continue
$ NewArr [] = each value
}

Return $ newArr

Instance

Array ([0] => Hello [1] => world. [2] => It's [3] => a [4] => beautiful [5] => day .)

Foreach ($ array as $ k => $ v ){
If ($ v = 'day '){
Unset ($ array [$ k]):
}
}

Using foreach is inefficient. Check the built-in functions of php.

$ Arr = array ("Hello", "world", "It's", "beautiful", "day ");

Instance 1

$ Arr = array_flip ($ arr );

Unset ($ arr ['World']);

$ Arr = array_flip ($ arr );

Print_r ($ arr );

Instance 2

The array_search () function is the same as the in_array () function. You can find a key value in the array. If this value is found, the key name of the matching element is returned. If not found, false is returned.

 

$ Arr = Array ([0] => Hello [1] => world. [2] => It's [3] => a [4] => beautiful [5] => day .);

If ($ key = array_search ('day', $ arr ))){

Unset ($ arr [$ key]);

}

Instance 3

The array_splice () function is similar to the array_slice () function. It selects a series of elements in the array but does not return them. Instead, it deletes them and replaces them with other values.

 

If ($ key = array_search ('day', $ arr ))){

Array_splice ($ arr, $ key, 1 );

}