Removal method: 1. Use "foreach($arr as $k=>$v){//loop body}" to loop through the array; 2. In the loop body, use "if(is_array( $v)){unset($arr[$k]);}" Determine whether the array element "$v" is an array type, and if so, delete the element.
The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer
php removes an array Method of array elements
Step 1. Use foreach to traverse the array
foreach ($arr as $k => $v){ //循环体语句块; }
Traverse the given $arr array, in each loop The value of the current array will be assigned to $v, and the key name will be assigned to $k.
Step 2. In the loop body, determine whether the array element $v
is an array type. If so, delete the element
if(is_array($v)){ unset($arr[$k]); }
is_array() function is used to detect whether a variable is an array. Returns TRUE if the variable being examined is an array, otherwise FALSE.
$Array variable name [key name]
Can access specific array elements
unset() function is used for destruction given variable.
Implementation code:
<?php header('content-type:text/html;charset=utf-8'); $arr=array(1,array(2,3),-5,21,array(4,array(2,3))); var_dump($arr); foreach($arr as $k=>$v){ if(is_array($v)){ unset($arr[$k]); } } var_dump($arr); ?>
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