How do strlen() and mb_strlen() differ?
Practice question · write your own answer- Define the concept in one or two sentences.
- Give a small example and trace what happens.
- Explain one limitation, trade-off, or common mistake.
How do strpos(), stripos() and str_contains() work?
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- Give a small example and trace what happens.
- Explain one limitation, trade-off, or common mistake.
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How do substr(), explode() and implode() work?
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- Give a small example and trace what happens.
- Explain one limitation, trade-off, or common mistake.
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When should you use str_replace() versus preg_replace()?
Practice question · write your own answer- Define the concept in one or two sentences.
- Give a small example and trace what happens.
- Explain one limitation, trade-off, or common mistake.
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How do trim(), ltrim(), rtrim() and str_pad() work?
Practice question · write your own answer- Define the concept in one or two sentences.
- Give a small example and trace what happens.
- Explain one limitation, trade-off, or common mistake.
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How do sprintf() and number_format() format output?
Practice question · write your own answer- Define the concept in one or two sentences.
- Give a small example and trace what happens.
- Explain one limitation, trade-off, or common mistake.
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How do Laravel Str::slug(), Str::limit() and Str::mask() work?
Practice question · write your own answer- Define the concept in one or two sentences.
- Give a small example and trace what happens.
- Explain one limitation, trade-off, or common mistake.
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How do you escape output safely with htmlspecialchars()?
Practice question · write your own answer- Define the concept in one or two sentences.
- Give a small example and trace what happens.
- Explain one limitation, trade-off, or common mistake.