How to use if statement in php to determine whether a value is in an array

Implementation steps: 1. Use the foreach statement to loop through the array, the syntax is "foreach ($array as $value){//Loop body statement block;}"; 2. In the loop body, use the if statement to match The "===" operator can be used to determine whether the specified value is in the array. The syntax "if($value==="specified value"){echo "The specified value $z is in the array
";break; }".

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer

In PHP, you can use the if statement with foreach statement and the "===" operator to determine whether the specified value is in the array.

Implementation steps:

Step 1: Use the foreach statement to loop through the array

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

Traverse the given $array array , the value of the current array will be assigned to $value in each loop.

Step 2: In the loop body, use the if statement with the "===" operator to determine whether the specified value is in the array

if($value==="指定值"){ echo "指定值 $z 在数组中
"; break; }

Complete Sample code:

"; break; } // else{ // echo "指定值 $z 不在数组中
"; // } } } $arr=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); echo "原数组："; var_dump($arr); f($arr,"green"); ?>

Cannot be executed, not in the array. So modify it and add an intermediate variable to record the status

"; } else{ echo "指定值 $z 不在数组中
"; } } $arr=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow"); echo "原数组："; var_dump($arr); f($arr,"green"); f($arr,"b"); ?>

Recommended study: "PHP Video Tutorial"

The above is the detailed content of How to use if statement in php to determine whether a value is in an array. For more information, please follow other related articles on the PHP Chinese website!