Comparison of methods for deleting specified values ​​in an array in php_PHP Tutorial

You also have a function yourself. PHP tutorial. Many built-in functions have problems (not errors, but narrow applicability)

for(old array...){
if(is the value to be deleted)
Continue
$newArr[]=each value
}

return $newArr

Example

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]):
}
}

The efficiency of using foreach is not high, see PHP’s built-in functions

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

Example 1

$arr = array_flip($arr);

unset($arr['world']);

$arr = array_flip($arr);

print_r($arr);

Example 2

The array_search() function is the same as in_array(), searching for a key value in the array. If the value is found, the key of the matching element is returned. If not found, returns false.

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

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

unset($arr[$key]);

}

Example 3

The array_splice() function is similar to the array_slice() function, selecting a range of elements in an array, but instead of returning them, it deletes them and replaces them with other values.

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

array_splice($arr, $key,1);

}

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