php set_time_limit(0) function to set program execution time

set_time_limit(0);

The number in the brackets is the execution time. If it is zero, it means that it will be executed permanently until the end of the program. If it is a number greater than zero, the program will end after the set number of seconds, regardless of whether the program is completed.
A simple example, display 1500 statements on a web page. If the expiration time is not set, the program will end when it reaches 791. If the comment character // before set_time_limit(0); is removed, the program will not run until 1 Just ended.

<?php 
//set_time_limit(0); 
$i=1500; 
include ("inc/conn.php"); 
while($i>0) 
{ 
$sql="INSERT INTO php (php) 
VALUES (&#39;$i&#39;)"; 
if ($conn->execute($sql)===flase) 
{ 
//echo "数据插入错误".$conn->errormsg(); 
} 
else 
{ 
$phpid=$conn->Insert_ID(); 
echo $i."已经存入数据库,编号：".$phpid; 
} 
$i--; 
echo ""; 

} 
?>

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