How to determine whether a value is in a two-dimensional array in php

Judgment method: 1. Loop through the two-dimensional array, the syntax "foreach($arr as $v){}" will assign the current sub-array to "$v"; 2. In the loop body, Use in_array() to determine whether the specified value is in the subarray, the syntax is "in_array("value",$v)", if so, it returns TRUE.

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

How to determine the value of php Whether it is in a two-dimensional array

In PHP, you can use the foreach statement and the in_array function to determine whether the value is in a two-dimensional array.

1. Use the foreach statement to loop through the two-dimensional array

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array(
	array("a", "aa", "aaa"), 
	array("b", "bb", "bbb"), 
	array("c", "cc", "ccc")
);
foreach($arr as $v){
	
}
?>

Traverse the given two-dimensional array, and in each loop, add the children of the current array Array is assigned to $v.

2. In the loop body, use in_array() to determine whether the specified value is in the subarray

in_array(search,array) Search whether the specified value exists in the array Value; returns TRUE if the value is found in the array, FALSE otherwise.

foreach($arr as $v){
	if(in_array("bb",$v)){
		echo "指定值在二维数组中";
	}
}

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