The example in this article describes how PHP uses the in_array function to check whether a certain value exists in an array. Share it with everyone for your reference. The specific analysis is as follows:
PHP uses the in_array() function to check whether a certain value exists in the array. If it exists, it returns TRUE, otherwise it returns FALSE. It is very easy to use. Let me introduce the in_array() function to you in depth.
When I was writing a piece of code in PHP recently, I needed to determine whether a certain value was in another set of values. The in_array function is used to check whether a certain value exists in the array. It is relatively vague to understand directly through concepts, and its function can be understood through specific examples.
The syntax is as follows:
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bool in_array( mixed needle, array array [, bool strict] )
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| 参数 | 说明 |
|---|---|
| needle | 需要在数组中搜索的值，如果是字符串，则区分大小写 |
| array | 需要检索的数组 |
| strict | 可选，如果设置为 TRUE ，则还会对 needle 与 array 中的值类型进行检查 |
Parameter description:
Example 1:
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$os = array("Mac", "NT", "Irix", "Linux"); if (in_array("Irix", $os)) { echo "Got Irix"; } if (in_array("mac", $os)) { echo "Got mac"; } ?> |
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$os = array("Mac", "NT", "Irix", "Linux"); if (in_array("Irix", $os)) {
The output result is: 1.13 found with strict check Example 4: Applying arrays within arrays
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