While working on a PowerShell script, I was required to check if a string contains multiple values. I tried different methods, and in this tutorial, I will show you how to do so with complete scripts and examples.
To check if a string contains multiple values in PowerShell, you can use the -match operator with a regular expression. It allows you to check for multiple patterns in a single line (e.g., $string -match “quick|lazy|fox”).
Now, let us check all the methods.
Method 1: Using the -match Operator with Regular Expressions
In PowerShell, you can use the -match operator with regular expressions to check if a string contains any of multiple substrings.
Here is a complete PowerShell script.
$string = "The quick brown fox jumps over the lazy dog"
$patterns = "quick|lazy|fox"
if ($string -match $patterns) {
Write-Output "The string contains one of the specified values."
} else {
Write-Output "The string does not contain any of the specified values."
}In this example, the -match operator checks if $string contains any of the words “quick”, “lazy”, or “fox”. The pipe (|) character in the pattern acts as an OR operator.
Look at the screenshot below after I executed the PowerShell script using VS code.
Read How to Split Strings by Newlines in PowerShell?
Method 2: Using the Contains() Method in a Loop
Here is another method to check if a string contains multiple values in PowerShell. You can use the Contains() method in a loop to check each substring individually.
Here is a complete example.
$string = "The quick brown fox jumps over the lazy dog"
$substrings = @("quick", "lazy", "fox")
$contains = $false
foreach ($substring in $substrings) {
if ($string.Contains($substring)) {
$contains = $true
break
}
}
if ($contains) {
Write-Output "The string contains one of the specified values."
} else {
Write-Output "The string does not contain any of the specified values."
}Here, we loop through each substring in the $substrings array and use the Contains method to check if it exists in $string. If any substring is found, the loop breaks early for efficiency.
Method 3: Using Select-String Cmdlet
The PowerShell Select-String cmdlet is another approach that can search for patterns within strings.
Here is an example.
$string = "The quick brown fox jumps over the lazy dog"
$patterns = "quick|lazy|fox"
if ($string | Select-String -Pattern $patterns) {
Write-Output "The string contains one of the specified values."
} else {
Write-Output "The string does not contain any of the specified values."
}In this example, Select-String is used to search for the patterns within $string. This cmdlet is particularly useful when working with large blocks of text or files.
Read Split a String into Variables in PowerShell
Method 4: Using the -contains Operator with Arrays
In PowerShell, you can also use the -contains operator to check if any substring is present in the string by converting the string to an array of substrings.
Here is a complete PowerShell script.
$string = "The quick brown fox jumps over the lazy dog"
$substrings = @("quick", "lazy", "fox")
$stringArray = $string.Split(" ")
if ($substrings | ForEach-Object { $stringArray -contains $_ }) {
Write-Output "The string contains one of the specified values."
} else {
Write-Output "The string does not contain any of the specified values."
}Here, we split the string into an array of words and then check if any of the specified substrings are present in this array using the -contains operator.
Conclusion
In this PowerShell tutorial, I explained how to check if a string contains multiple values using various methods like:
- Using the -match Operator with Regular Expressions
- Using the Contains() Method in a Loop
- Using Select-String Cmdlet
- Using the -contains Operator with Arrays
You may also like the following PowerShell tutorials:
- Split a String and Get the First and Last Element in PowerShell
- Split String by Tab Character in PowerShell
- Count the Number of Characters in a String in PowerShell
Bijay Kumar is an esteemed author and the mind behind PowerShellFAQs.com, where he shares his extensive knowledge and expertise in PowerShell, with a particular focus on SharePoint projects. Recognized for his contributions to the tech community, Bijay has been honored with the prestigious Microsoft MVP award. With over 15 years of experience in the software industry, he has a rich professional background, having worked with industry giants such as HP and TCS. His insights and guidance have made him a respected figure in the world of software development and administration. Read more.
