How to query element position in php array

Query method: 1. Use array_search() to search for a given element value and return the key name or index, syntax "array_search(element value, array)"; 2. Use implode() and strpos() , the syntax is "strpos(implode(array),element value."")".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php array query element Position method:

Method 1: Using array_search() function

<?php
$array=array(2,3,4,1,5);
$find=3;

//利用数组查找 找到所需要元素的索引位置
function find_by_array_search($array,$find)
{
    return array_search($find,$array);
}
var_dump(find_by_array_search($array,$find));
?>

Method 2: Use string search-strpos()

Idea:

• Use implode() to convert the array into a string

• Use the strpos() function to find the first occurrence of a string in another string.
  

<?php
$array=array(2,3,4,1,5);
$find=4;

//字符串查找
function find_by_string($array,$find)
{
    $string=implode($array);
    return strpos($string,$find."");
}
var_dump(find_by_string($array,$find));
?>

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