How to convert all elements in an array into strings in php

Conversion method: 1. Use the foreach statement to traverse the array by referencing the loop, with the syntax "foreach ($array as &$v){//loop body}"; 2. In the loop body, use strval() converts the array element "$v" into a string, the syntax is "$v=strval($v);".

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

php will Method to convert all elements into string

In PHP, you can use the foreach statement to traverse the array, and use strval() in the loop to convert the array element value into a string.

1. Use the foreach statement to loop through the array

Note: Under normal circumstances, when using the foreach statement to traverse the array, the backup of the array is operated, and generally not Affects the array itself.

foreach ($array as $value){
    //循环体语句块;
}

But we need to convert the array elements into strings, so we need to use a reference loop (add & before $value so that the foreach statement will assign a value by reference instead of copying a value), then in the loop body Operating on an array affects the array itself.

foreach ($array as &$value){
    //循环体语句块;
}

2. In the loop body, use strval() to convert the array element $value into a string

strval() function is used to obtain the string of the variable Value, often used to convert a value into a string.

Implementation code:

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$arr=[1,2,"hello",TRUE,3.14];
var_dump($arr);
foreach($arr as &$value){
	$value=strval($value);
}
var_dump($arr);
?>

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