PHP How to delete a value element in a one-dimensional array php tips

The following small series for you to share a PHP delete one-dimensional array of a value element of the operation method, has a good reference value, I hope to be helpful. Let's take a look at it with a little knitting.

1. Write for Loop yourself

Remove the value of the $tmp element from the array.

<?php$tmp = ' 324 '; $arr = Array (' 0 ' = ' 321 ', ' 1 ' = ' 322 ', ' 2 ' = ' 323 ', ' 3 ' = ' 324 ', ' 4 ' = ' 325 ', ' 5 ' => ; ' 326 ',);

Code

foreach ($arr as $k = + $v) {if ($tmp = = $v) unset ($arr [$k]);} Print_r ($arr);? >

At this time

Array ([0] = 321 [1] = 322 [2] = 323 [4] = = 325 [5] = 326)

To reset the index, add one sentence

foreach ($arr as $k = + $v) {if ($tmp = = $v) unset ($arr [$k]);} $arr = Array_values ($arr);p rint_r ($arr);? >

This time the result

Array ([0] = 321 [1] = 322 [2] = 323 [3] = = 325 [4] = 326)

Array_merge () can also achieve the same effect

foreach ($arr as $k = + $v) {if ($tmp = = $v) unset ($arr [$k]);} $arr = Array_merge ($arr);p rint_r ($arr);? >

This time the result

Array ([0] = 321 [1] = 322 [2] = 323 [3] = = 325 [4] = 326)

2. Take advantage of PHP's own function, because it is implemented in C, more efficient than its own writing.

Using Array_search and Array_splice, this array_splice automatically resets the sequence values.

$key =array_search ($tmp, $arr); Array_splice ($arr, $key, 1); Var_dump ($arr);

This time the result

Array ([0] = 321 [1] = 322 [2] = 323 [3] = = 325 [4] = 326)

Best practices

$arr = Array_merge (Array_diff ($arr, Array ($tmp))); Var_dump ($arr);

Results

Array ([0] = 321 [1] = 322 [2] = 323 [3] = = 325 [4] = 326)

Here, if the array elements are complex data structures, comparisons can be achieved. Of course the data itself is still one-dimensional.

In the above example, $tmp is a value, and if $tmp is an array or other complex data structure that removes all $tmp elements from $array, the above method works equally well

$arr = Array_merge (Array_diff ($arr, $tmp)); Var_dump ($arr);

The above PHP delete one-dimensional array of one of the value elements of the operation method is the small part to share all the content of everyone, I hope to give you a reference, but also hope that we support PHP Chinese network.

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